Year annual % growth 1971 6.223999995592095 1972 7.2751920338105975 1973 6.5009838569610565 1974 -0.9756106765791088 1975 -15.350817877744944 1976 13.054419619230345 1977 9.251529149851834 1978 10.925761339619427 1979 6.853404115380755 1980 7.198108361943767 1981 7.412132895858534 1982 2.1964922583098456 1983 1.0299244117260713 1984 5.894521845687791 1985 6.071030534519053 1986 11.416573037864211 1987 -1.3618925862007245 1988 5.6606408609085435 1989 7.176410412208426 1990 5.878442085283069 1991 -3.198866618260155 1992 1.2374092884719374 1993 -1.3082317088808395 1994 4.507200241168945 1995 5.85524650212335 1996 3.9396203830777807 1997 10.356720113495285 1998 5.3218089566291695 1999 3.984204672009156 2000 8.136385212575476 2001 1.415936143032127 2002 -1.9165464865653945 2003 0.6046677255657045 2004 4.930422711302597 2005 9.61861391097601 2006 2.8425527054991306 2007 5.863802281591262 2008 4.398986837278045 2009 -2.7410084839125517 2010 7.990134014020711 2011 8.93650034707801 2012 -2.1073393735830876 2013 12.26870583375603 2014 -6.7637536269985645 2015 4.95156354031927 2016 5.285861132768758 2017 -0.38721182325532766 2018 0.75056284455286 2019 0.2783808016501297 2020 -3.1801492724020193 2021 5.704490834811878 2022 6.180669124236488 2023 3.5246342119664433