Year annual % 1960 0.063182597888167 1961 -0.180407721631565 1962 0.10844026784809 1963 3.10525365608344 1964 -0.402731571003658 1965 -0.10548523224379 1966 0.967969025261369 1967 4.57556214033291 1968 -0.158346528794567 1969 -0.40901502529407 1970 1.84393596556387 1971 1.61303596395808 1972 3.23155422354874 1973 10.5601757413101 1974 17.3289809824411 1975 4.48772226915906 1976 2.63371150730571 1977 4.78822401445964 1978 4.86006458554252 1979 3.65446799796414 1980 6.6749195345051 1981 9.70000000000015 1982 5.8189000297783 1983 3.70423546319373 1984 3.89727260149768 1985 0.346458791259884 1986 0.737002855391939 1987 0.290007909438412 1988 2.55651945320742 1989 2.81320089714805 1990 2.61780104712051 1991 4.358333333333 1992 4.76722829992821 1993 3.53658536585389 1994 3.72497055359284 1995 3.45057509584895 1996 3.48855945858916 1997 2.66251459711946 1998 5.27034200348766 1999 2.74456130240604 2000 1.53474023697699 2001 1.41678473206098 2002 1.80787246281536 2003 1.08967632577286 2004 1.42127115937402 2005 2.97507092684449 2006 3.60923564224389 2007 2.02735317779569 2008 5.44078221100769 2009 0.583308405623702 2010 1.62285235577035 2011 3.1744709215131 2012 1.66357102479206 2013 2.10501231233612 2014 3.14299050879095 2015 2.10438980238359 2016 2.09056659525742 2017 3.87120115774237 2018 0.884709160571235 2019 0.662891865764326 2020 -1.1387021539305 2021 2.47710241465447 2022 3.37869862549928 2023 2.48886560125754