Year annual % 1961 2.132657516673362 1962 1.2232985642157246 1963 2.0153316563997734 1964 0.850777996901769 1965 1.742647024177792 1966 3.702392606888772 1967 4.071216516565215 1968 4.237052640119238 1969 3.770263852354404 1970 4.617605148481324 1971 4.823227617866955 1972 6.5749237216982905 1973 12.743183964470518 1974 23.57912414204194 1975 15.06364582385995 1976 1.7735748626281946 1977 5.996415596715465 1978 8.190503299529475 1979 10.123556891144773 1980 11.758155747305423 1981 7.355999412788819 1982 4.71487274431162 1983 5.415090077254376 1984 5.183243101340437 1985 4.450868453416319 1986 4.583562645440779 1987 7.337770192382791 1988 4.498859354586202 1989 5.68893659993266 1990 7.471990399794137 1991 4.8266563646224085 1992 3.9055654365796926 1993 1.9908502989024441 1994 3.190762918327337 1995 3.0463687910141033 1996 2.7484522591507243 1997 1.4936997685117888 1998 2.800181585315613 1999 2.536389911432323 2000 1.4140976756272323 2001 2.0847831653898083 2002 0.9078562366999563 2003 1.1158721672058505 2004 3.7472262139151695 2005 4.676776804926263 2006 4.096370735693625 2007 4.373543659102694 2008 2.5327735243088796 2009 0.3184365322461531 2010 2.1586663019486707 2011 1.6853218819098004 2012 1.092741855665878 2013 1.913552957240185 2014 1.0648202712204835 2015 2.78817037438111 2016 1.201325225273564 2017 2.1715435302071597 2018 0.45617083241312173 2019 2.9611884630726735 2020 -0.8669508602416585 2021 3.0259651587619203 2022 4.30104615816353 2023 4.735828043271326