lingering missing data issue

[austinclemens]

try graphing this grouped line:

year share of income type 1962 19.5% Bottom 50% 1963 19.1% Bottom 50% 1964 18.7% Bottom 50% 1965 19.2% Bottom 50% 1966 19.6% Bottom 50% 1967 20.5% Bottom 50% 1968 20.7% Bottom 50% 1969 21.0% Bottom 50% 1970 20.9% Bottom 50% 1971 20.4% Bottom 50% 1972 20.3% Bottom 50% 1973 20.4% Bottom 50% 1974 20.5% Bottom 50% 1975 20.3% Bottom 50% 1976 20.2% Bottom 50% 1977 20.0% Bottom 50% 1978 20.0% Bottom 50% 1979 20.1% Bottom 50% 1980 19.9% Bottom 50% 1981 19.5% Bottom 50% 1982 19.0% Bottom 50% 1983 18.3% Bottom 50% 1984 17.9% Bottom 50% 1985 17.9% Bottom 50% 1986 17.7% Bottom 50% 1987 17.2% Bottom 50% 1988 16.9% Bottom 50% 1989 16.9% Bottom 50% 1990 16.8% Bottom 50% 1991 16.6% Bottom 50% 1992 15.8% Bottom 50% 1993 15.9% Bottom 50% 1994 15.8% Bottom 50% 1995 15.4% Bottom 50% 1996 15.1% Bottom 50% 1997 14.8% Bottom 50% 1998 14.9% Bottom 50% 1999 14.8% Bottom 50% 2000 14.6% Bottom 50% 2001 14.9% Bottom 50% 2002 14.8% Bottom 50% 2003 14.5% Bottom 50% 2004 14.2% Bottom 50% 2005 13.8% Bottom 50% 2006 13.5% Bottom 50% 2007 13.7% Bottom 50% 2008 13.7% Bottom 50% 2009 13.6% Bottom 50% 2010 13.0% Bottom 50% 2011 12.7% Bottom 50% 2012 12.3% Bottom 50% 2013 12.7% Bottom 50% 2014 12.5% Bottom 50% 2015 Bottom 50% 2016 Bottom 50% 1962 12.6% Top 1% 1963 12.7% Top 1% 1964 12.9% Top 1% 1965 12.8% Top 1% 1966 12.6% Top 1% 1967 12.3% Top 1% 1968 12.2% Top 1% 1969 11.5% Top 1% 1970 11.0% Top 1% 1971 11.1% Top 1% 1972 11.1% Top 1% 1973 10.9% Top 1% 1974 10.6% Top 1% 1975 10.5% Top 1% 1976 10.5% Top 1% 1977 10.7% Top 1% 1978 10.8% Top 1% 1979 11.1% Top 1% 1980 10.7% Top 1% 1981 11.0% Top 1% 1982 11.2% Top 1% 1983 11.5% Top 1% 1984 12.5% Top 1% 1985 12.5% Top 1% 1986 12.2% Top 1% 1987 13.3% Top 1% 1988 14.9% Top 1% 1989 14.5% Top 1% 1990 14.5% Top 1% 1991 13.9% Top 1% 1992 15.0% Top 1% 1993 14.6% Top 1% 1994 14.7% Top 1% 1995 15.3% Top 1% 1996 16.0% Top 1% 1997 16.6% Top 1% 1998 16.9% Top 1% 1999 17.7% Top 1% 2000 18.3% Top 1% 2001 17.3% Top 1% 2002 17.1% Top 1% 2003 17.2% Top 1% 2004 18.3% Top 1% 2005 19.4% Top 1% 2006 20.1% Top 1% 2007 19.9% Top 1% 2008 19.5% Top 1% 2009 18.5% Top 1% 2010 19.8% Top 1% 2011 19.6% Top 1% 2012 20.8% Top 1% 2013 19.6% Top 1% 2014 20.2% Top 1% 2015 Top 1% 2016 Top 1%