Year annual % growth 1961 -10.638591735577506 1962 45.2384632340366 1963 0 1964 -8.196661333649473 1965 8.928500262326367 1966 16.39343133655926 1967 0 1968 -7.042155988897463 1969 21.212072374318083 1970 1.20010411876612 1971 -9.930944203656168 1972 2.029586083609942 1973 13.978589992232756 1974 0.23573844157363055 1975 -9.294158525520402 1976 31.517656552649242 1977 27.317771938280956 1978 8.907269916077468 1979 -3.2005001352019917 1980 -5.142862404978203 1981 5.203906510747885 1982 3.946552405833941 1983 2.5826058477464926 1984 -2.5914977714478624 1985 15.554023848438064 1986 -10.270341188496872 1987 -3.481999170237856 1988 18.719565608627093 1989 7.430323722109748 1990 18.011603252764004 1991 -3.6241443599572563 1992 -1.0296944391893703 1993 3.983198679112391 1994 15.295568981786275 1995 22.528144686192306 1996 7.646794889276549 1997 12.177440823890535 1998 10.62339306313558 1999 -1.2602779388073344 2000 2.702391308604575 2001 2.7409907601725365 2002 3.092955185874956 2003 5.995368202196644 2004 8.114157989519839 2005 12.886830422708812 2006 5.56120323520517 2007 8.164451917191414 2008 0.7398744687388898 2009 -9.3471064312958 2010 13.89691362347844 2011 4.14881478412255 2012 -4.108311326282134 2013 -3.5202403429004505 2014 -6.979167434355489 2015 -2.777372940066954 2016 5.317354107540069 2017 2.6153909521905234 2018 0.6459962514395556 2019 9.751025403564654 2020 -17.43771087546753 2021 8.497113923745019 2022 5.7705019793612 2023 -6.686506048915405