control, such as general economic conditions, seasonal economic fluctuations, weather conditions including wildfires and flooding, global demand, food shortages, food safety concerns, infectious diseases, fluctuations in the U.S. dollar, cyber-attacks, transportation issues, product recalls, and government regulations, including tariffs and other import restrictions on foreign produce and other goods. In 2022 and continuing into 2023, for example, we experienced inflationary pressures due to supply chain disruptions that adversely impacted and may continue to adversely impact our business and results of operations. Environmental and weather-related issues, which have been exacerbated by climate change, such as freezes, drought, wildfires, hurricanes and flooding, may also lead to increases, temporary or permanent, or spikes in the prices of some ingredients, such as produce and meat. Any increase in the prices of the ingredients most critical to our menu, in particular chicken, as well as corn, cheese, avocados, beans, rice, and tomatoes, could adversely compress our margins, or cause us to raise our prices, reducing customer demand. Alternatively, in the event of cost increases with respect to one or more of our raw ingredients, we might choose to temporarily suspend serving menu items, such as guacamole or one or more of our salsas, rather than pay the increased cost. Additionally, as a substantial volume of produce and other items are procured from Mexico, and occasionally other countries including Chile and Peru, any new or increased import duties, tariffs or taxes, or other changes in U.S. trade or tax policy could result in higher food and supply costs that would adversely impact our financial results. Any such changes to our menu prices or available menu could negatively impact our restaurant transactions, business, and comparable restaurant sales during the shortage and thereafter.
Our principal food product is chicken. In fiscal 2023, 2022, and 2021, the cost of chicken included in our product cost was approximately 10.0%, 11.0%, and 9.9%, respectively, of our revenue from company-operated restaurants. Material increases in the cost of chicken could materially and adversely affect our business, operating results, and financial condition. Changes in the cost of chicken are impacted by a number of factors, including seasonality, increases in the cost of grain, disease, and other factors that affect domestic and international supply of and demand for chicken products. Additionally, environmental and animal rights regulations or voluntary programs have in the past led to increases, and could lead to future increases in, the cost or supply of chicken and other foods. We often ask our suppliers to use fixed price contracts or other financial risk management strategies to reduce potential price fluctuations in the cost of chicken and other commodities. We have implemented menu price increases in the past to significantly offset increased chicken prices, due to competitive pressures and compressed profit margins. We may not be able to offset all or any portion of increased food and supply costs, or labor, construction and utility costs through higher menu prices in the future. If we implement further menu price increases in the future to protect our margins, average check size and restaurant transactions could be materially and adversely affected, at both company-operated and franchised restaurants.
Public health crises, including the COVID-19 pandemic have had, and may in the future have, a significant negative impact on our business, sales, results of operations and financial condition.
Pandemics, epidemics or other public health crises, including COVID-19, have disrupted, and may continue to disrupt, our restaurant operations, including by causing temporary closures of some restaurants, closures of dining rooms, limited capacity restrictions and/or decreased operating hours for some restaurants due to government mandates and/or staffing shortages.
If future public health emergencies, including additional surges of COVID-19, at a significant number of our locations require us to temporarily close those locations for disinfection or result in a large number of our employees becoming ill or quarantined and being unable to work, our business and results of operations could be further adversely affected, which may also impact our financial condition.COVID-19 or other public health crises may also adversely affect our ability to implement our growth plans, including delays in the opening or construction of new restaurants or the remodel of existing restaurants.
If in the event of another public health crisis or if COVID-19 conditions reemerge, our sales and operating costs may be materially adversely affected, which could impact our asset values, including goodwill, derivative instruments and property and equipment assets, as well as our ability to meet certain covenant provisions in our debt arrangements in future periods, and have a material adverse effect on our financial results, future operations and liquidity.
Even after a new public health crisis has subsided, we may continue to experience negative impacts to our financial results due to the public health’s crisis impact on the economy in general, globally, nationally and in the locate markets in which we operate, including the availability of credit generally, adverse impacts on our liquidity, and/or decreases in consumer discretionary spending that depress demand for our products. In addition, the perceived risk of infection or a resurgence or concern of a resurgence of COVID-19 or other diseases may continue to adversely affect traffic to our restaurants and, in turn, may have a material adverse effect on our business, liquidity, financial condition and results of