from stronger demand for our products and services across all major geographies as a result of our customers continuing to resume laboratory and manufacturing operations except in China, where the Company’s sales were flat due to third-party shipping logistic execution issues and in Japan. Foreign currency translation had minimal impact on total sales in the third quarter and increased sales by 2% in the first nine months of 2021. In addition, the Company’s first nine months of 2021 included five more calendar days than the first nine months of 2020.
Instrument system sales increased 10% and 31% for the third quarter and first nine months of 2021, respectively, due to customer demand continuing to increase to
pre-pandemic
levels as customer laboratories and manufacturing facilities continued to return to normal operations. This strength in the first nine months was broad-based, particularly in LC,
LC-MS
and TA instrument system sales. Foreign currency translation had minimal impact on instrument system sales in the third quarter and increased sales by 2% in the first nine months of 2021. Recurring revenues (combined sales of precision chemistry consumables and services) increased 11% and 18% for the third quarter and first nine months of 2021, respectively, with foreign currency translation being neutral in the quarter and increasing sales by 3% in the first nine months of the year. In the first nine months of 2021, recurring revenues benefited from five additional calendar days as compared to the first nine months of 2020.
Geographically, the Company’s sales growth in the third quarter and first nine months of 2021 was broad-based. During the third quarter of 2021, sales increased 8% in Asia, 16% in the Americas, and 10% in Europe, with the effect of foreign currency translation increasing sales in Europe by 2%. During the first nine months of 2021, sales increased 25% in Asia, 20% in the Americas, and 26% in Europe, with the effect of foreign currency translation increasing sales by 1% in both Asia and the Americas, and 7% in Europe.
In the third quarter and first nine months of 2021, China sales were flat and increased 37%, respectively, driven by stronger demand due to customers resuming laboratory and manufacturing operations as well as the
pent-up
demand caused by the 20% decline in China’s sales in the first nine months of 2020 when the negative impact of the
COVID-19
pandemic lockdowns was occurring. China’s sales growth in the third quarter was negatively impacted by the third-party shipping logistic issues in China that resulted in flat sales growth. Foreign currency translation increased China sales growth by 3% and 5% in the quarter and first nine months of 2021, respectively. Sales increased 13% in the U.S. and 32% in India, while sales decreased by 1% in Japan in the quarter. Foreign currency translation decreased sales growth by 10% in India and 4% in Japan in the third quarter of 2021.
During the third quarter of 2021, sales to pharmaceutical customers increased 16%, driven by growth in all regions, including 14% in China, 41% in India, 16% in the Americas and 10% in Europe as strong customer demand continued to recover to
pre-pandemic
levels. Foreign currency translation had minimal impact on pharmaceutical sales growth in the quarter. Combined sales to industrial customers, which include material characterization, food, environmental and fine chemical markets, increased 9%, with the effect of foreign currency translation having minimal impact on sales growth in the quarter. During the third quarter of 2021, combined sales to academic and government customers decreased 9%, with foreign currency translation increasing academic and government sales by 2%. Sales to our academic customers declined 15% while sales to our government customers increased by 1%. Sales to our academic and government customers are highly dependent on when institutions receive funding to purchase our instrument systems and, as such, sales can vary significantly from period to period.
During the first nine months of 2021, sales to pharmaceutical customers increased 27%, driven by growth in all regions as strong customer demand continued to recover to
pre-pandemic
levels. Foreign currency translation increased pharmaceutical sales growth by 3%. Combined sales to industrial customers increased 23%, with the effect of foreign currency translation increasing sales growth by 4%. During the first nine months of 2021, combined sales to academic and government customers increased 8%, as customers ramped up their spending in the first nine months of the year following lower spending levels throughout 2020 due to the
COVID-19
pandemic. Foreign currency translation increased academic and government sales growth by 2%.
Operating income increased 21% and 47% for the third quarter and first nine months of 2021, respectively. These increases were primarily a result of the increase in sales volumes caused by our customers continuing to resume laboratory and manufacturing operations throughout the world. Both the quarter and
operating income increases were partially offset by the restoration of expenses that had been decreased in the 2020 periods which consisted of a series of cost reduction actions that included salary reductions, furloughs and reductions in
non-essential
spending that increased operating income by approximately $81 million in 2020. In addition, operating income in the third quarter and first nine months of 2020 also included $6 million and $27 million, respectively, of severance-related costs in connection with a reduction in workforce and lease termination costs.