Year % of total taxes 1972 37.628865979381445 1973 41.26679462571977 1974 45.0229709035222 1975 45.8377239199157 1976 44.28678117998506 1977 49.82954545454545 1978 53.36906584992342 1979 57.52343364578194 1980 61.82666666666666 1981 61.82858090185677 1983 57.2593127644206 1984 56.44176943474052 1985 45.991762519463556 1986 50.96082581610101 1987 48.76497624742359 1988 48.55155861836658 1989 52.66872880991394 1990 51.16747961753156 1991 51.335506044387316 1992 49.46084896013315 1993 47.5703005642197 1994 41.93123807515585 1995 40.18642488393378 1996 38.56557504821204 1997 41.23307443435211 1998 47.164308344014216 2008 31.16544791531751 2009 31.01215584329867 2010 28.90219567479953 2011 29.02842381535859 2012 30.035851441293744 2013 27.554205426167115 2014 29.86248454628947 2015 28.436508214259327 2016 29.688169250482353 2017 30.21128482161133 2018 34.17279145973195 2019 34.67626783489599 2020 31.40426298825676 2021 35.20615233704985 2022 33.59146189230954