How Many Jobs in the Political Organizations Industry?

How many people work for the "political organizations industry," which the US Bureau of Labor Statistics defines as "political parties, political action committees (PACs), political campaign organizations, and political organizations and clubs that are engaged in promoting the interests of national, state, or local political parties or candidates"? Here's the BLS figure:

The relatively small size of the number, compared with the amount of attention, surprised me. Although the total number of jobs for people being professional athletes appears to be only about 13,700, and that group generates a lot of attention from the rest of us, too.