Figure 5. Monthly Total Transportation Employment, Actual and Underlying Trend (thousands), January 1990 - July 2010
Source: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, special tabulations.
Once the seasonality is removed from the data, the total trend of transportation employment is more obvious. Figure 5, which compares the actual data to the underlying trend, indicates that the decline in the trend of transportation employment in 2008 and 2009 has reversed direction in 2010. The seasonality of the data tended to mask the positive growth in employment in 2010.