Year annual % growth 1961 1.564366304490889 1962 4.179193395465532 1963 5.071891222301048 1964 10.902908223900525 1965 18.407937752533115 1966 8.404577046820407 1967 10.839043811400884 1968 11.27638205201822 1969 10.844671055377347 1970 10.142568200180378 1971 14.770509771519144 1972 23.296169857994613 1973 3.914499858690789 1974 40.480338082068556 1975 18.173705052457194 1976 13.06522353551091 1977 5.11524420437901 1978 1.9888489027573684 1979 -0.63742447627736 1980 -1.075695993846864 1981 -10.978708096726379 1982 -2.262180157799861 1983 8.31264981635995 1984 -1.3816369395285477 1985 2.107192755051358 1986 -14.214171093259651 1987 -7.832172084128459 1988 -9.188004951973198 1989 6.694746129719547 1990 10.601812020158263 1991 10.406141247193773 1992 4.1322530141084854 1993 0.5236982140850017 1994 2.323173752983166 1995 3.1003744376700553 1996 5.8094532777761145 1997 4.524139344839611 1998 3.441398897896036 1999 3.1278900596514205 2000 2.9579817313888412 2001 5.119719782195546 2002 7.058233899282953 2003 7.553501059622008 2004 7.510540385497649 2005 7.223940573929767 2006 7.142483157445881 2007 9.106465570114807 2008 -1.2831881271864916 2009 1.08350207999122 2010 5.3299019277980335 2011 4.022178174586543 2012 0.9898300033915035 2013 -0.18992453657389774 2014 2.3507262542181877 2015 -0.8814835628122495 2016 4.451305254148366 2017 2.05744826077418 2018 0.07753143982411359 2019 -0.3200436359762904 2020 2.2472415848798306 2021 6.452709944765502 2022 2.6573396248728898 2023 3.433171727187755