Year annual % growth 1966 19.486024952628895 1967 10.182116044049792 1968 7.621588806902253 1969 7.004081700713897 1970 4.562084406756583 1971 -33.37860261732814 1972 9.78744284375081 1973 6.679548744370663 1974 9.96362138034992 1975 -12.370346637141964 1976 39.987394306930355 1977 2.8229736104426166 1978 -5.677061988912698 1979 9.689285475321554 1980 2.9778850477791394 1981 4.813454024466694 1982 5.891126176970033 1983 -7.735985790199706 1984 13.898971751954676 1985 13.3635898740919 1986 -3.554130121101906 1987 -4.166020028696806 1988 13.443168477075005 1989 3.1929960644405497 1990 -2.686218070314567 1991 6.0957746376133315 1992 2.4701707538246467 1993 -19.946223131193747 1994 4.923764851672672 1995 8.843104060460874 1996 24.46528679762079 1997 6.91406815314015 1998 6.858987314211376 1999 0.858907933657818 2000 -2.11484583470623 2001 1.9400672351270742 2002 2.544514815925652 2003 5.274913471461943 2004 -1.5338258796621034 2005 -2.391286997689008 2006 4.852775379627843 2007 4.723394110249117 2008 5.58198136357548 2009 7.213418796701561 2010 4.218289773175911 2011 5.369726435665669 2012 2.7174538047559906 2013 5.330462326816104 2014 4.483734433689108 2015 6.631089726995199 2016 7.047603031249466 2017 1.275481796885927 2018 3.7026924440954616 2019 5.375642103533224 2020 -5.039402211262043 2021 10.176170996630447 2022 5.054016528826992 2023 4.019253832551598