Year annual % 1960 1.45797598627783 1961 1.07072414764754 1962 1.19877334820149 1963 1.23966942148761 1964 1.27891156462591 1965 1.58516926383662 1966 3.01507537688433 1967 2.77278562259309 1968 4.27179615288544 1969 5.46238620028745 1970 5.83825533848245 1971 4.29276668813068 1972 3.27227824655272 1973 6.17776006377044 1974 11.0548048048047 1975 9.14314686496539 1976 5.74481263549081 1977 6.5016839947284 1978 7.63096383885606 1979 11.2544711292794 1980 13.5492019749685 1981 10.3347153402771 1982 6.13142700027493 1983 3.21243523316069 1984 4.30053547523424 1985 3.54564415209365 1986 1.89804772234276 1987 3.6645632175169 1988 4.07774110744403 1989 4.82700303008954 1990 5.39795643990325 1991 4.23496396453849 1992 3.02881967814969 1993 2.95165696638559 1994 2.60744159215457 1995 2.80541968853654 1996 2.93120419993445 1997 2.33768993730738 1998 1.55227909874361 1999 2.18802719697358 2000 3.37685727149929 2001 2.82617111885407 2002 1.58603162650601 2003 2.27009497336115 2004 2.67723669309172 2005 3.3927468454955 2006 3.22594410070406 2007 2.85267248150136 2008 3.83910029665096 2009 -0.355546266299717 2010 1.64004344238988 2011 3.15684156862202 2012 2.06933726526057 2013 1.46483265562717 2014 1.62222297740827 2015 0.118627135552451 2016 1.26158320570527 2017 2.1301100036598 2018 2.44258329692807 2019 1.81221007526012 2020 1.23358439630638 2021 4.69785886363742 2022 8.00279982052121 2023 4.11633838374488