Year annual % 1961 1.3501538964218156 1962 1.244634712001286 1963 1.2708014329693356 1964 1.5039396790116086 1965 1.9198258112473496 1966 2.898778534683373 1967 3.480335621725004 1968 4.367188240536819 1969 4.958488449574787 1970 5.262728475668737 1971 5.06980750726423 1972 5.826044108793354 1973 9.92880660941735 1974 14.983947729100478 1975 9.262790663152714 1976 5.503491912795937 1977 6.717535077419427 1978 6.82659461471485 1979 8.29672198172402 1980 9.854087069832246 1981 10.870957344293572 1982 8.827078400984504 1983 5.824475049587207 1984 3.6078793128998257 1985 3.3383891899150626 1986 3.132379040933671 1987 4.791601413669213 1988 4.539998176338116 1989 4.681253240029719 1990 3.7433290993795794 1991 3.381811336110303 1992 2.2788543459214736 1993 2.370324836398936 1994 1.9595679677018296 1995 2.2633257316071678 1996 1.830764559334554 1997 1.72444795356148 1998 1.123865624955343 1999 1.9238556417362673 2000 2.2651951766986116 2001 1.5736767667921043 2002 1.5539946596134513 2003 2.8247395206592216 2004 3.260873898289816 2005 3.135454556746552 2006 3.0838367335286563 2007 3.3005456442315477 2008 3.996316455425756 2009 0.6167807151257705 2010 2.2362220025570707 2011 2.0631094754314887 2012 1.8621649281276973 2013 1.7018803606723338 2014 1.9411989774866782 2015 0.9280427947577294 2016 0.950322479212474 2017 1.7908032845466835 2018 1.6511181981861967 2019 1.6785078743474742 2020 1.0708102680749647 2021 4.5847453588969955 2022 7.041025943302358 2023 2.6251185297469704