Year annual % 1971 5.611672063475595 1972 5.897933680642595 1973 13.980099679576057 1974 18.08781729339661 1975 5.312412304320816 1976 8.02874440722006 1977 8.57940941126563 1978 4.650019603265605 1979 13.512227826383636 1980 24.158081473748155 1981 9.577975179868133 1982 7.287149229857334 1983 4.736921435213958 1984 8.181919734451967 1985 3.6666578554134475 1986 7.185437902255501 1987 3.8618487069356178 1988 4.532320473985109 1989 5.607915377981868 1990 6.205353073071308 1991 8.11890514430118 1992 5.355399289815253 1993 4.8031329873566335 1994 6.555430511224188 1995 5.403201463910705 1996 4.488755815117784 1997 2.7541005236664233 1998 1.9656797111853734 1999 5.8113604228332605 2000 3.4099293453386963 2001 6.232012515473116 2002 3.6131613542673904 2003 5.38767398576752 2004 4.345881628206328 2005 3.9480996996314133 2006 6.57512374147187 2007 8.308315279286589 2008 7.256763879788551 2009 1.954558245136127 2010 3.1656946955337446 2011 3.1614637980007956 2012 3.440880300341618 2013 2.276171307765921 2014 1.7153042313852183 2015 1.7137541898800421 2016 1.6974558006058444 2017 2.14018364039309 2018 2.3479541271693662 2019 1.6723919136926284 2020 0.517914420517684 2021 3.9417214805177494 2022 7.699067358013977 2023 4.564525794286837