Year annual % 1961 3.7762492331493 1962 3.37774249953788 1963 3.38344084827971 1964 3.324812256572 1965 3.07801594606672 1966 3.1368520744 1967 3.01220889410319 1968 2.9454134689543 1969 2.67821577184567 1970 2.22394599716648 1971 2.08626469472026 1972 2.15702659759237 1973 2.10196780847228 1974 2.19837318042567 1975 2.10249753227455 1976 1.99372122298973 1977 1.92262578992779 1978 1.82901929834416 1979 1.84403799009551 1980 1.82447106113543 1981 1.87320626745219 1982 1.97451714414123 1983 2.0796790384824 1984 2.01433042557431 1985 1.86935515474441 1986 1.89162625794696 1987 1.90236034965574 1988 1.76496271128727 1989 2.09017801858247 1990 1.92448488335946 1991 1.63530770758668 1992 1.1538161192326 1993 0.028786218243318 1994 -0.0354303686250107 1995 0.998300395950931 1996 1.48008970426178 1997 1.45850217538744 1998 1.53403815421676 1999 1.48607226256731 2000 1.19112592398474 2001 0.948856613551314 2002 0.917899316903102 2003 1.0484449238834 2004 1.21010542490902 2005 1.12786445855189 2006 1.07505129401544 2007 0.953586964300523 2008 0.950220144755314 2009 1.20726564406139 2010 1.19286442880631 2011 1.21689072909974 2012 1.66523655939962 2013 1.98473866725772 2014 2.0061078993716 2015 2.05902596620676 2016 2.0372244221997 2017 1.93364715643057 2018 1.99032207024617 2019 2.08787614010317 2020 1.89786382312175 2021 2.89836288600667 2022 2.93148141736729 2023 1.78894630690457