Year annual % growth 1971 1.3884024721252217 1972 6.573556673065966 1973 -0.9368572837663862 1974 9.84119734692861 1975 -2.1627790325346297 1976 -1.3234917793203778 1977 6.182296621241591 1978 -2.1558309354065415 1979 7.37595727375124 1980 10.915957289340739 1981 17.971081307592456 1982 -4.240180951441957 1983 -6.574545751765527 1984 2.0170237780389186 1985 5.931458164457609 1986 8.004985918238617 1987 1.8817155665139325 1988 -3.128535047359975 1989 -12.495128817513319 1990 14.369407743719023 1991 1.3661541643932367 1992 2.840377831426494 1993 5.105195745645432 1994 0.17956414924798025 1995 6.9434472020808045 1996 2.2640064575903267 1997 6.170111146675012 1998 4.214635484474741 1999 5.896489710740553 2000 12.514646935578185 2001 7.448235244141216 2002 2.5327595634786064 2003 5.711356475358855 2004 3.1717258465008342 2005 4.859523362407401 2006 5.481408309433647 2007 8.288261991707401 2008 12.902628181735082 2009 -0.3415567740317442 2010 2.4291252837945336 2011 8.711358192754176 2012 5.6094599504924645 2013 8.755674640043168 2014 4.988389780788623 2015 -0.024821291929967515 2016 1.851688747135256 2017 5.462127354415742 2018 5.700311558059838 2019 5.217024328433382 2020 4.856620360034114 2021 6.647837615655149 2022 6.006101743735925 2023 6.6267330525245