Year annual % 1961 2.74300205095355 1962 2.78756110751737 1963 2.85228626989425 1964 2.92146738362092 1965 2.95565028182257 1966 2.92306196148098 1967 2.8513940443225 1968 2.79957915384359 1969 2.81895876925024 1970 2.87404801635448 1971 2.8551095670976 1972 2.82207289980343 1973 2.84934823255016 1974 2.90629015453328 1975 2.9698081604234 1976 2.95107765303905 1977 3.01383058269639 1978 3.15296756668139 1979 3.31006706462783 1980 3.47513143153372 1981 4.9520582474037 1982 4.87893747585362 1983 3.53206953691521 1984 3.57048963248047 1985 3.52642325430433 1986 3.42534490965137 1987 3.27465279782194 1988 3.0598132400628 1989 2.89906313102692 1990 3.92763404063868 1991 3.86261212941662 1992 2.35371957141242 1993 0.643706109370984 1994 0.384695200039076 1995 1.33973896938307 1996 1.31311319862575 1997 1.4219497200906 1998 1.55771417374628 1999 1.58414187759209 2000 1.64539194870845 2001 1.7100319119575 2002 0.973524734407785 2003 0.927820930669199 2004 1.61586394638623 2005 1.61004001098983 2006 1.54559660977253 2007 1.4536370817991 2008 1.37188502638988 2009 1.36047026604448 2010 1.40442428093574 2011 1.27755003393578 2012 1.27742540846959 2013 1.45650590321443 2014 1.897214219374 2015 2.26178492558276 2016 1.83580791714073 2017 1.42882552688137 2018 1.30788220910804 2019 1.0995932626289 2020 0.83517614833256 2021 0.722822505475776 2022 0.710745642903734 2023 0.700188903168177