Wages and Salaries arising from Government Employment

BEA data from Table 1.12 at FRED, National Income by Type of Income: Compensation of Employees. In particular: wages and salaries arising from government employment, as a percent of wages and salaries arising from all sources:

Graph #1: Wages and Salaries arising from Government Employment

From 14% of total in the late 1940s, rising to 21% in the early 1970s, but falling since that time, and below 17% as of 2014. Government's share of wages and salaries has been falling since 1975.

That's gonna be all levels of government, not just Federal.