Year annual % growth 1961 1.5941373357587878 1962 2.2361111999936725 1963 5.220770201578361 1964 9.111585899144387 1965 1.7036867450087527 1966 3.8627773166526964 1967 4.806274391192261 1968 1.2989737514644162 1969 2.7724321394189104 1970 5.54337868926234 1971 1.829823990334404 1972 -0.10241673636299709 1973 5.264159719979517 1974 2.969755897201452 1975 3.691352631658077 1976 0.6479403692230505 1977 2.2674180768633647 1978 1.9535932634662032 1979 0.24383268065604113 1980 3.2457364231187 1981 5.146653562016823 1982 4.7861093830442485 1983 5.039968182753981 1984 5.832997577050847 1985 2.957405899683067 1986 2.2181936330371457 1987 2.399773838878062 1988 5.525837982298782 1989 2.4499036586562113 1990 4.423731192772593 1991 1.112920400751591 1992 4.101757820723947 1993 1.0969539650809566 1994 2.952285897091201 1995 2.6381049373518124 1996 5.5886362520632105 1997 1.0943575602792066 1998 3.5287444663754286 1999 2.709677941751451 2000 2.201027422223973 2001 3.1178474870865642 2002 2.5954006970669354 2003 4.309399386465955 2004 3.99258738798423 2005 4.813305906863931 2006 4.219277429467866 2007 3.513920105067797 2008 3.008099821609477 2009 2.1897193159358608 2010 5.036152936043308 2011 4.463219681030139 2012 2.9738281827167867 2013 4.481736836568601 2014 3.0942008431401575 2015 2.8691031877984443 2016 2.719602903510193 2017 4.478775692023731 2018 2.844330518066144 2019 3.4503059579172373 2020 2.790141800863452 2021 4.3059767175984405 2022 2.885908470913236 2023 2.803537001804841