Year annual % 1962 2.6212610628087134 1963 7.9225215038489125 1964 6.935510090517866 1965 9.02022438489547 1966 3.833330198765708 1967 4.959322234295513 1968 9.710731683668072 1969 7.832694425068084 1970 14.25631340656308 1971 7.606113720358394 1972 12.20131664757406 1973 8.75359289554332 1974 5.992684044321834 1975 -4.165800729287142 1976 11.281464525537402 1977 0.79481548222968 1978 -5.041350379780255 1979 2.8879911274093217 1980 -2.2272915948154832 1981 -3.65265723597507 1982 -6.461511701035306 1983 -5.121146024747574 1984 -3.4159809314737686 1985 -3.3488441402983824 1986 -2.0953719404476487 1987 -3.2699878147968633 1988 0.19977152698649547 1989 0.6491312345993521 1990 6.48376678929769 1991 0.7314944935746581 1992 3.1290158991645853 1993 -0.2665529457247544 1994 0.7112019169821338 1995 0.7479273878587378 1996 2.742719364408842 1997 1.8995366156038216 1998 2.231741069954495 1999 -0.08972318506110355 2000 4.581469153430447 2001 -0.5320814651286412 2002 -0.3794661920870368 2003 3.123302680700263 2004 5.71805809437744 2005 2.7828918335587787 2006 3.509886237145082 2007 2.699277862109682 2008 2.1095851924623332 2009 -1.7406168927365968 2010 2.772861289893271 2011 1.691328896620675 2012 1.9132795476141808 2013 0.07755015725669523 2014 0.7188417315440887 2015 0.6292040429280377 2016 2.4044649137589005 2017 0.17911057942325215 2018 0.4618475670827564 2019 -0.3630472920318226 2020 -5.376039793054758 2021 4.224798376362429 2022 4.225268611342557 2023 0.25414514524931064