Year Ended December 31, 2022 Compared to Year Ended December 31, 2021
For the year ended December 31, 2022, consolidated net operating revenue was $114,893,000 compared with $108,343,000 for the year ended December 31, 2021, an increase of $6,550,000 or 6.0%. The increase in revenue in 2022 was due to increases in gross local revenue of $2,284,000, gross political revenue of $1,846,000, non-spot revenue of $1,689,000, gross interactive revenue of $1,577,000, and gross barter revenue of $302,000 partially offset by a decrease in gross national revenue of $697,000 and an increase in agency commissions of $598,000 from 2021. The most significant increases in gross local revenue and in agency commissions occurred in our Asheville, North Carolina; Charleston, South Carolina; Ithaca, New York; and Manchester, New Hampshire markets. The gross political revenue increased due to an increase in the number of national, state and local elections. The increase in non-spot revenue is primarily due to us hosting more events again in 2022. The markets with the most significant increases in 2022 in non-spot events were Charleston, South Carolina; Clarksville, Tennessee; Hilton Head, South Carolina; Jonesboro, Arkansas; Milwaukee, Wisconsin; Portland, Maine and Yankton, South Dakota. The increase in gross interactive results is primarily due to an increase in our streaming and website content revenue. The decrease in gross national revenue was attributable to decreases at the majority of markets due to the focus on local market advertisers offset by increases at our Columbus, Ohio; Manchester, New Hampshire; and Portland, Maine markets.
Station operating expense was $87,537,000 for the year ended December 31, 2022, compared with $83,245,000 for the year ended December 31, 2021, an increase of $4,292,000 or 5.2%. The increase in operating expenses was primarily a result of increases in sales survey expenses, compensation related expenses, commission expense, bad debt expenses, barter expenses, music licensing fees, utilities, merchant account fees, and promotional expenses of $1,407,000, $965,000, $840,000, $352,000, $346,000, $311,000, $286,000, $153,000 and $113,000, respectively, partially offset by decreases in healthcare costs of $530,000 from 2021.
We had operating income for the year ended December 31, 2022 of $13,070,000 compared to $15,051,000 for the year ended December 31, 2021, a decrease of $1,981,000. The decrease was a result of the increase in net operating revenue partially offset by the increase in station operating expense, described above, a decrease in other operating (income) expense of $21,000 offset by an increase in our corporate general and administrative expenses of $4,260,000 or 42.4%. The increase in corporate general and administrative expenses was primarily attributable to expenses under the employment agreement we had with our founder and CEO, Mr. Christian upon his death of which $3,900,000 was recorded in the third quarter of 2022. In addition, we had an increase in legal expenses, and transportation related costs of $207,000, and $156,000, respectively, from 2021. For our other operating (income) expense, net in 2022 we recorded a gain on the sale of fixed assets of $14,000 compared to a loss on the sale of fixed assets of $7,000 in 2021.
We generated net income of $9,202,000 ($1.52 per share on a fully diluted basis) during the year ended December 31, 2022, compared to $11,157,000 ($1.85 per share on a fully diluted basis) for the year ended December 31, 2021, a decrease of $1,955,000. The decrease in net income is due to the decrease of operating income, described above, an increase income taxes of $540,000, offset by a decrease in interest expense of $154,000, an increase in interest income of $394,000 and an increase in other income of $18,000. The decrease in interest expense is due to no longer having any debt outstanding, after paying off the remaining balance in the fourth quarter of 2021. The increase in interest income is related to our short-term investments as described in footnote 1 (Summary of Significant Accounting Policies). The increase in other income is primarily due to insurance proceeds for weather-related damages of $535,000 and reimbursements from the FCC related to their spectrum auction of $116,000 in 2022 versus insurance proceeds in 2021 of $589,000 and other gains of $45,000 in 2021 as described in footnote 16 (Other Income). The increase in our income tax expense is due to the permanent difference between book and taxable income related to the compensation paid to our founder and CEO as described above and in footnote 6 (Income Taxes).