Year annual % 1961 3.80161068444217 1962 4.22449762244454 1963 4.76839880436694 1964 5.2600415569322 1965 5.50590833310072 1966 5.45819271639918 1967 5.33421368477601 1968 5.22551319507625 1969 5.87263581847903 1970 6.42822840129502 1971 6.59707885757326 1972 6.8950075952983 1973 7.06328347013647 1974 7.63125203528996 1975 8.60242431911883 1976 9.47163848135568 1977 9.86688640599534 1978 9.54312251115156 1979 8.41087217395553 1980 6.78594578461038 1981 5.16918315271092 1982 3.96188662419799 1983 3.49104949912794 1984 3.84908065815576 1985 4.74065758768982 1986 5.71722780582316 1987 6.387601261095 1988 6.43592711166889 1989 7.73065980860428 1990 10.2192410303274 1991 8.52273921010975 1992 -0.85067596789085 1993 -1.93877242196354 1994 1.98369194458263 1995 0.980299863135974 1996 2.35911080877199 1997 3.52617803029176 1998 3.98289680964869 1999 3.45804880527132 2000 3.1016497493543 2001 3.11224350831744 2002 3.04136539252469 2003 2.16637325167082 2004 1.47246847937649 2005 1.51442896223044 2006 1.91756063912333 2007 2.13179519553233 2008 2.02400160866773 2009 2.04234815532952 2010 1.9883070131748 2011 1.89789156839079 2012 1.84933894374145 2013 1.81267131886039 2014 1.7680638456514 2015 1.72124773942831 2016 1.67550925836571 2017 1.64501401282776 2018 1.61772854346232 2019 1.57623975223144 2020 1.49363957876332 2021 1.40284750995694 2022 1.37371534912362 2023 1.38273344206501