Fig. 9
From: Congressional symmetry: years remaining mirror years served in the U.S. House and Senate
Distribution of years served and years remaining by party affiliation for U.S. Senators in the 1980 U.S. Senate: Blue = 59 Democrats (D); Red = 41 Republicans (R). Note the average years served (\(\overline{c }\)) and remaining (\(\overline{g }\)) for members of each party. The light red and light blue-shaded regions on either side depict the proportion of the 100-senate seats filled by predecessors (on left) and successors (or right)