Year annual % 1961 -13.25665326957494 1962 -1.927421036973115 1963 3.7790686894695966 1964 8.129217243934846 1965 8.118173198841873 1966 5.113658172016386 1967 -3.9167379399224984 1968 -0.835264039286983 1969 8.425492832663295 1970 10.41996543500234 1971 3.9417520587309696 1972 2.3459769724558157 1973 5.771962328961067 1974 1.6490663782710442 1975 4.8132186990076775 1976 1.066141608438656 1977 5.697216342560225 1978 7.462483290033944 1979 5.304638086360896 1980 5.854691122870676 1981 3.9324870315898863 1982 4.612338200770537 1983 5.928033902300939 1984 8.217003817782583 1985 6.180869686953699 1986 5.349236870887083 1987 7.29409550810098 1988 7.853106664601313 1989 4.001896495468543 1990 3.4689689729484314 1991 6.362056060819057 1992 9.605187326637775 1993 9.755077536368773 1994 9.465671575907251 1995 8.470811640509893 1996 7.707917408675684 1997 6.03455948364109 1998 1.7003498033067075 1999 5.2369328845308445 2000 6.5756029093722645 2001 5.977776669558608 2002 7.098844483625882 2003 8.020078524538235 2004 8.230758254114832 2005 9.091229406453948 2006 10.206979234964479 2007 11.630720807652878 2008 7.802112667319022 2009 7.192220333304803 2010 9.127422259118447 2011 7.812144121250242 2012 6.660728991649378 2013 6.399921111549716 2014 6.128519908275877 2015 5.897541638525581 2016 5.766104723011026 2017 5.896496834752568 2018 5.830571981751234 2019 5.184442225779051 2020 0.7685266108056226 2021 7.236880004980307 2022 3.1487022141867556 2023 4.845753648368941