Year annual % growth 1966 0.873654251140124 1967 5.542941848271866 1968 5.634346816259267 1969 11.548456271236532 1970 -2.5717083055274514 1971 6.165981748008704 1972 3.994579052047456 1973 3.966241238364063 1974 5.874109763629747 1975 -2.552778523408378 1976 -3.0337369151830558 1977 7.813686717608576 1978 -10.522622541974755 1979 9.944679009525274 1980 2.21732151316381 1981 -12.070848260479167 1982 -2.8152169462223355 1983 6.81790126778175 1984 2.4749112884566955 1985 -9.449930866356866 1986 10.051277329429013 1987 1.079025740017741 1988 -4.894878568412096 1989 -7.487259947794726 1990 -5.407057143638113 1991 10.376165802472997 1992 10.188713877201266 1993 3.531083822137404 1994 4.49963606306558 1995 -7.164586603367567 1996 6.4518777509091905 1997 9.151433512561937 1998 1.8487560158344678 1999 -7.928867319013264 2000 -3.8232183289571395 2001 -7.361987409534095 2002 -10.955220776525323 2003 15.967188003897874 2004 11.976056108059112 2005 7.423159238955336 2006 9.099786372829072 2007 7.533967506186443 2008 3.6211004495031176 2009 -7.2598243852707895 2010 10.907942067697519 2011 7.666609032371625 2012 -2.913326285883599 2013 1.5035316717546152 2014 -5.054047385028042 2015 0.7659323907551254 2016 -5.60113973937672 2017 2.574070490385651 2018 -4.8049225445118395 2019 -6.156550489876778 2020 -7.696452682401329 2021 15.71426594825418 2022 4.570723785328568 2023 -2.0835269585618903