Year annual % 1961 1.82646564503569 1962 1.93847578760676 1963 2.0367715358222 1964 2.12653096511339 1965 2.21082498176929 1966 2.28586899101876 1967 2.35928898765117 1968 2.43568405206842 1969 2.51203784781522 1970 2.58266726200911 1971 2.66438023105211 1972 2.75523424912123 1973 2.86131160844522 1974 3.51677509892555 1975 4.21862056881238 1976 4.57941022913447 1977 4.97592593299985 1978 5.24339351566261 1979 5.39558108348086 1980 5.46487388114531 1981 5.55896670913241 1982 5.66358415604838 1983 5.66323454711501 1984 5.54475224285615 1985 6.09212580368761 1986 6.44953845576848 1987 6.04222261537441 1988 5.7087506345919 1989 5.41922571104531 1990 5.1561545139319 1991 4.90206693091657 1992 4.641575087888 1993 4.27173505207488 1994 2.93952293196926 1995 1.81119013610918 1996 1.70157643392211 1997 1.59938914436727 1998 1.50882966873571 1999 1.43167337575081 2000 1.35943683310458 2001 1.28845205052626 2002 1.21408381409051 2003 1.15573172024923 2004 1.52050035159895 2005 1.85946621776946 2006 1.79115994007007 2007 1.74406111328877 2008 1.72461361834632 2009 1.73916451569952 2010 6.61155222833165 2011 10.6840726819136 2012 9.75816930384769 2013 7.65038581747282 2014 4.9227496816523 2015 4.45160788841889 2016 4.80412978549779 2017 3.21694904054482 2018 1.29724948709333 2019 0.0350068045198641 2020 -1.29824513056146 2021 -0.5059218392323 2022 1.22741823795981 2023 1.47683734209876