It is true that the average annual percentage increase in family income since 1970 (0.8 %) has not kept pace with the growth of that income in the 60's (3.0 % yearly). (religion-online.org)
Between 2004 and 2012, the average annual percentage increase for a member of Congress was 15.4 percent. (ballotpedia.org)
Consequently, annual percentage increases in levies set by districts also tend to be higher than the baseline. (newsday.com)