This chart shows that, from 1964 through 2002, significant percentages of incumbents in both the House and Senate who run for reelection have been reelected. The X-axis indicates each election year; the Y-axis indicates the percentage of incumbents seeking reelection who were reelected in the next election. Both House and Senate incumbents have enjoyed high rates of reelection. House incumbents' reelection rates have been consistently higher and less variable than Senate incumbents' rates.