Year annual % growth 1971 5.652973679326223 1972 5.018791070881036 1973 5.226009468959418 1974 5.021968019131236 1975 4.837803647333089 1976 3.777998936368448 1977 3.188814274861798 1978 4.661193491595327 1979 3.5062375226848133 1980 3.521531549951689 1981 3.6228875677606993 1982 1.797376343567251 1983 1.8600646833035341 1984 1.395575470994089 1985 2.484489961549528 1986 2.214158352162073 1987 2.875219528433462 1988 2.3770683109914756 1989 0.8978343700880629 1990 2.701164176855528 1991 3.1659796122360575 1992 2.9272613562987004 1993 1.1450510032267687 1994 1.0230764043811575 1995 0.7991672351335808 1996 1.7244813800827217 1997 1.2567940429613458 1998 1.9053572443680054 1999 1.7741851646378706 2000 2.4155956652784454 2001 2.4401780669235222 2002 2.1094290738238755 2003 1.8548279740522133 2004 1.319298106242556 2005 1.54418209604313 2006 2.0691574826884533 2007 2.2151883687174063 2008 2.604524511916466 2009 2.379028390583727 2010 0.8127359606120876 2011 0.004091468826942446 2012 -0.22847598805627456 2013 0.2504791669375379 2014 0.7733701251003708 2015 1.343401135436494 2016 1.9408718720284668 2017 1.0787024412038875 2018 1.0329347497014112 2019 1.7503879356614647 2020 0.9979155444948447 2021 4.175840369996337 2022 1.5781696343173337 2023 0.7843036918311554