Year annual % 1961 1.1663264381608656 1962 3.1050253181434897 1963 4.736737505815071 1964 8.210799058212004 1965 6.192538581873919 1966 5.630471630320784 1967 4.13094007348036 1968 6.355048650193922 1969 7.900102425599357 1970 7.7014587095024325 1971 6.115484125207885 1972 6.659662167188074 1973 7.039216859728896 1974 5.754589917965376 1975 4.683482155825416 1976 6.302850361602921 1977 4.650087792687913 1978 4.10264405324574 1979 4.818202502583134 1980 5.062099181037709 1981 2.1865605925686538 1982 2.8672536257467414 1983 1.7091211956534096 1984 4.907710844561251 1985 4.452695918468507 1986 3.843979891893028 1987 4.867021285409592 1988 4.030182365299623 1989 3.199978786497894 1990 1.9459330844022986 1991 1.1366153623658022 1992 1.5609795140389906 1993 3.7031193687655986 1994 3.6149920207748494 1995 3.9861714836884516 1996 5.4785583124694455 1997 5.356005946645581 1998 2.6619132982395115 1999 3.7456184413442486 2000 5.891569518595759 2001 3.622464484943194 2002 4.572186645897958 2003 5.943161186573249 2004 7.637394371276457 2005 7.184478525646824 2006 8.296932304964997 2007 8.94894426700587 2008 5.905424067981585 2009 2.786337537460625 2010 7.81582458498562 2011 6.381233175879089 2012 5.446668541040239 2013 5.221775155970349 2014 4.792720338517313 2015 4.404530947823446 2016 4.5566219202169975 2017 5.241650354920594 2018 4.935665422573152 2019 3.9839810598111853 2020 -1.4012044301338022 2021 7.628482965917428 2022 3.6016886245835167 2023 4.447556758223257