Year annual % 1960 1.28885903549376 1961 2.10237396324092 1962 1.24628537807022 1963 1.33796971443194 1964 2.534972840902 1965 4.0690287353295 1966 3.48923368982031 1967 3.53899153280631 1968 1.98613552880718 1969 3.23822451961743 1970 4.99187711721285 1971 5.95739773780432 1972 6.42570844638613 1973 9.43398734926114 1974 11.7241259217023 1975 13.4259418678705 1976 11.0203906361099 1977 11.1519640869288 1978 11.1356076531848 1979 13.2936586533206 1980 13.6602406858852 1981 15.2542442656565 1982 14.6390324191597 1983 12.3032071438236 1984 11.5264813036767 1985 16.2942269399101 1986 18.6549189263064 1987 16.1605814426616 1988 12.7795448229905 1989 14.730918284745 1990 14.320955727722 1991 15.334802353322 1992 13.8746803836056 1993 9.71746732988991 1994 8.93852493545717 1995 8.68044422624465 1996 7.35411338706952 1997 8.59778263173693 1998 6.88054637817278 1999 5.18149279747878 2000 5.33895102929212 2001 5.70190018305717 2002 9.4947107032486 2003 5.67941771099112 2004 -0.692030271024132 2005 2.06284616504634 2006 3.24390776468065 2007 6.17780683499409 2008 10.0745755249182 2009 7.21531413612566 2010 4.08972989470464 2011 4.9992669696526 2012 5.72465791678297 2013 5.78446909667201 2014 6.12983770287141 2015 4.54064227737906 2016 6.57139642173964 2017 5.18424664766128 2018 4.51716522786592 2019 4.12024587014984 2020 3.21003597454107 2021 4.61167217803206 2022 7.03972661255866 2023 6.0739085322053