Year annual % 1960 3.42429906542058 1961 1.76312460493452 1962 5.09672908138148 1963 5.69971168745222 1964 4.02154147421213 1965 3.4828212200169 1966 -1.0135793646964 1967 -0.748276993897715 1968 0.436479069044525 1969 2.94989135439242 1970 1.27918132376476 1971 4.1553520683533 1972 3.75917055722263 1973 4.08461403612973 1974 17.5568227452454 1975 7.91828926702741 1976 8.50215244349303 1977 12.5970009920069 1978 9.7160327495434 1979 8.33136541815462 1980 9.40837947437956 1981 12.4925283921001 1982 10.5278072972983 1983 6.20793538870313 1984 12.4475693291853 1985 7.7286389008592 1986 8.73355918706675 1987 2.69873997713767 1988 2.36905505487641 1989 3.2599694922639 1990 6.78259401511006 1991 7.98616600790512 1992 5.7402466286874 1993 5.18311396030801 1994 5.14167152953361 1995 6.12358164775523 1996 2.98680922773017 1997 1.03819895051614 1998 2.75311330764477 1999 0.684782608695643 2000 1.89463456763464 2001 0.619801875297975 2002 2.79561966936936 2003 1.16773367477592 2004 1.49344403381774 2005 0.982641660015951 2006 3.28476166954811 2007 2.04208512673344 2008 3.71484311494064 2009 0.971862998667636 2010 0.993557401226392 2011 0.9069249096918 2012 1.28712240079219 2013 1.88065466724086 2014 0.442310053557048 2015 1.5579071134626 2016 1.63531114327064 2017 0.754663249323619 2018 1.80391671141896 2019 0.303386036590383 2020 0.705968661338261 2021 1.40195883962006 2022 6.65704202759067 2023 6.09114152504141