Year % of total taxes 1972 13.577551781055321 1973 14.020801062181897 1974 13.459896396652816 1975 17.972961032075638 1976 18.217095755499653 1977 17.426668374535673 1978 20.094500360085014 1979 19.861478621726746 1980 19.34857759759277 1981 21.06018170640071 1982 22.96975906898918 1983 20.507740508661996 1984 22.313017900060984 1985 23.32932260116726 1986 23.107727199092825 1987 20.136611097960976 1988 21.583331890056982 1989 22.546573117201813 1990 26.470898940622302 1991 28.336536897498927 1992 31.087926776773372 1993 31.64936801553695 1994 33.70736564165586 1995 34.87291160416201 1996 35.7886637202702 1997 36.41332001086185 1998 33.149147407359415 1999 34.610145277312995 2000 35.783868903490976 2001 36.29613544625398 2002 35.94095352377467 2003 36.35632522053274 2004 39.48633528133481 2005 40.211756380990884 2006 43.89950049713838 2007 44.73703577287094 2008 47.72331592339628 2009 46.56514401310561 2010 42.31004555181716 2011 46.09413107752161 2012 45.24256145324493 2013 42.92782487786138 2014 42.15129150222159 2015 40.35576634396405 2016 39.88872231834675 2017 39.04263151364575 2018 39.92637011458588 2019 41.69120030205746 2020 40.305194240325676 2021 39.89218997032564 2022 42.58079967980542