Household Income, 1967 — 2010 $40,000 ---------------- 2-222 222 e eee nee ee ee ee eee ee eee een eee eee 70% 60% $30,000 -------------- ++ - 22 nee neen mg - 50% 40% | ae : E E p l | i | Tait I 30% 209 $10,000 - Hild ! : 4 | | i { ll I WEEE l i) 10% $0 T T T T T T T T T 0% 1967 1970 1973 1976 1979 1982 198