Year annual % 1961 1.71274280235209 1962 1.771815446658 1963 1.82288051083073 1964 1.87520955776127 1965 1.9182437645623 1966 1.93157230618414 1967 1.95222814946374 1968 1.96402677518703 1969 1.94663780382344 1970 1.94996310135852 1971 1.91898561380681 1972 1.8972304503412 1973 1.91089152461237 1974 1.90237435317208 1975 1.88528364025798 1976 1.84634974810006 1977 1.88808957963941 1978 1.96576995110861 1979 1.98506885911282 1980 2.02316338913653 1981 2.04666208399315 1982 2.07568162496108 1983 2.15868350743327 1984 2.21985429530268 1985 2.24282802421943 1986 2.46308189937732 1987 2.69432128183629 1988 2.70753463158463 1989 2.50635793327127 1990 3.91879952364396 1991 1.21287531143333 1992 -1.76514580106588 1993 -0.136718078396713 1994 0.447447057726631 1995 0.212892577799668 1996 0.535570653886934 1997 1.31755512245558 1998 1.0151862403732 1999 0.564027525167457 2000 2.40478419249569 2001 5.785413309402 2002 5.66343352057259 2003 4.01910155879324 2004 3.35235443124014 2005 2.6748408801911 2006 2.20036392928469 2007 2.20265426987169 2008 2.52210725035976 2009 2.73656583182459 2010 2.78607305276662 2011 2.6928730024304 2012 2.62984140386497 2013 2.56345431818352 2014 2.49317673033998 2015 2.40868716120881 2016 2.4195089151865 2017 2.42113485779471 2018 2.36471306664028 2019 2.33284062492806 2020 2.29903034010859 2021 2.24176737112654 2022 2.17409124204784 2023 2.13120700196935