A stagnating minimum wage has led to increased wage inequality: Federal minimum wage as a percentage of the average U.S. production worker wage, 1964–2014

Minimum wage as a percentage of average wage  
1964 49.4% 50%
1965 47.6%
1966 45.7%
1967 49.1%
1968 53.0%
1969 49.8%
1970 47.0%
1971 44.1%
1972 41.0%
1973 38.7%
1974 45.1%
1975 44.4%
1976 45.4%
1977 42.3%
1978 45.1%
1979 45.7%
1980 45.3%
1981 45.0%
1982 42.6%
1983 40.9%
1984 39.5%
1985 38.3%
1986 37.5%
1987 36.7%
1988 35.5%
1989 34.2%
1990 37.3%
1991 40.4%
1992 39.5%
1993 38.5%
1994 37.5%
1995 36.5%
1996 39.5%
1997 41.2%
1998 39.6%
1999 38.2%
2000 36.7%
2001 35.4%
2002 34.4%
2003 33.5%
2004 32.8%
2005 32.0%
2006 30.8%
2007 33.6%
2008 36.3%
2009 39.0%
2010 38.1%
2011 37.3%
2012 36.7%
2013 36.0%
2014 35.2%  50%

Source: Author’s analysis of Current Employment Statistics survey data from the Bureau of Labor Statistics and the Fair Labor Standards Act and amendments

View the underlying data on epi.org.