Year annual % 1960 3.41812725350792 1961 1.69100191533953 1962 4.38398278172668 1963 4.99638188645285 1964 10.2758607417486 1965 4.94058806755308 1966 3.87365401861324 1967 5.37778183372858 1968 9.19166799519512 1969 2.20561093521246 1970 2.7404204305122 1971 6.47576543061856 1972 6.66249783515328 1973 10.7544718831368 1974 16.9363999989274 1975 17.8113972340213 1976 14.3426930852257 1977 11.7933469184054 1978 7.79935074552145 1979 7.46696151310738 1980 11.5946192492107 1981 11.3057566509548 1982 9.58492764677445 1983 8.3662926064564 1984 7.06765638328172 1985 5.19562195429435 1986 2.93357920442327 1987 4.11302886205058 1988 5.08592861394881 1989 6.59290980189131 1990 6.1495653117985 1991 4.31021289843465 1992 2.91932319285011 1993 2.19065319556437 1994 1.08855677589405 1995 0.791239406938498 1996 0.629194238120966 1997 1.19255883425839 1998 1.3994737857984 1999 1.16223155669444 2000 3.04210080667795 2001 2.57844080098896 2002 1.5712201278938 2003 0.877440386254785 2004 0.187120559084418 2005 0.623874450025191 2006 1.56666380704386 2007 2.5106656524034 2008 4.06595355358379 2009 -9.17360384430342E-07 2010 1.18413523154646 2011 3.41680754255211 2012 2.80833622561574 2013 1.4782861568881 2014 1.04119621178439 2015 -0.207928839905268 2016 0.356684500891695 2017 0.754015047084346 2018 1.08382098409305 2019 1.02409392963431 2020 0.290554555653239 2021 2.19457432340007 2022 7.12350773301402 2023 6.25064322154763