Year annual % 1961 1.80743378137271 1962 1.86157980690677 1963 1.91621213784079 1964 1.97781863812789 1965 2.047511136393 1966 2.12323359878108 1967 2.19962508876761 1968 2.27324990424639 1969 2.31506925460517 1970 2.24212871394503 1971 2.09973779296289 1972 1.9879022769448 1973 1.94473653837216 1974 1.9571287628841 1975 1.97307799451062 1976 1.49589646008345 1977 1.01704658559431 1978 1.01568309888253 1979 1.02484221158581 1980 1.03825529153642 1981 1.05983217954125 1982 1.08483139909751 1983 1.10674041281781 1984 1.13342789320946 1985 1.16366298957681 1986 1.18972588344787 1987 1.22954489080033 1988 1.57948857083318 1989 2.48552936890382 1990 3.07658185416468 1991 3.11315664341229 1992 3.18120254870409 1993 3.20438646726048 1994 3.14501489236555 1995 2.74938232580347 1996 2.61642604333973 1997 2.78239631088654 1998 2.7546192875739 1999 2.78215176573503 2000 2.80036047898137 2001 2.25163751502407 2002 2.20897342817341 2003 2.41778998181238 2004 2.16901718078334 2005 2.25132803027483 2006 2.01150212315221 2007 1.8735897550277 2008 2.07326328004891 2009 2.15485409702233 2010 2.071208345015 2011 1.53227695856897 2012 0.868655128872181 2013 0.608247676561223 2014 -0.0769490230926806 2015 0.428340361843656 2016 1.74517542237586 2017 1.86986089522388 2018 1.94305862344608 2019 2.22336107125156 2020 2.5340939316943 2021 2.11363722558977 2022 2.21079511675969 2023 2.88270795208001