Year annual % 1961 18.42688324046975 1962 11.990619742564263 1963 19.898714806205803 1964 40.35151611987766 1965 62.18478631375058 1966 72.31778297257418 1967 78.52849075087448 1968 116.24917359828123 1969 27.08022718874888 1970 4.187470636574091 1971 31.689969404238326 1972 69.16706647885192 1973 191.57411642297365 1974 28.48703817514388 1975 65.97787984470236 1976 47.291492415170694 1977 55.60669161936997 1978 46.80166098990787 1979 79.2081947056121 1980 54.762700979328685 1981 27.34459950511298 1982 18.16226689256051 1983 53.731047071060345 1984 56.349606827773755 1985 74.01716145432269 1986 70.96333508494445 1987 72.78399122228606 1988 74.63639178469182 1989 76.07946614817658 1990 106.83667649803513 1991 100.80816762216674 1992 59.623622696602496 1993 47.85192889293063 1994 38.95718236428664 1995 41.04832687287208 1996 26.43173777947429 1997 27.485166095239435 1998 12.38390545859724 1999 3.882996065208303 2000 3.5393084928220304 2001 4.826618332654874 2002 12.616276638970277 2003 16.541635153769192 2004 10.10505599648775 2005 0.6778683737401963 2006 7.41439912975062 2007 10.314968175511126 2008 8.902388578286846 2009 8.617074545234502 2010 5.746856984421811 2011 9.875420245683358 2012 9.41291247372213 2013 8.999246668845174 2014 10.220656603452483 2015 9.85542032172539 2016 8.165458339911225 2017 5.680183916207994 2018 7.52555040430903 2019 8.256489324868753 2020 10.97648088410648 2021 11.18062196096217 2022 4.244653551403616 2023 3.430970189551701