These fascinating maps, which were released by NPR, detail the most common jobs in each U.S. state from 1978-2014. Obviously, the country underwent massive changes in those 36 years, but things didn’t change all that much in certain places. One occupation that has weathered the storm of innovation and change? Truck driving.

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Interestingly, secretaries have taken a major hit throughout the years, and it probably doesn’t come as a huge surprise that farming has decreased significantly due to mechanization in the industry. NPR did not include categories such as “managers not elsewhere classified” and “salespersons not elsewhere classified.”