Year annual % 1961 2.66853061540825 1962 2.71848949401898 1963 2.69880272249047 1964 2.59754821050959 1965 2.45777003620438 1966 2.51243003456398 1967 2.61890578823746 1968 2.56351732749394 1969 2.44280638169478 1970 2.33134744576363 1971 2.27814084148089 1972 2.25189830666678 1973 2.23418666740503 1974 2.17245118804501 1975 2.06322787171083 1976 2.06408640648502 1977 2.16077562720869 1978 2.16684663904562 1979 2.09477320553944 1980 2.06613374362247 1981 2.00477920705315 1982 2.12939776184688 1983 2.31560248216637 1984 2.27131131674838 1985 2.1976259071683 1986 2.1091660357584 1987 2.02278735127578 1988 1.98166866487137 1989 1.94992547084097 1990 1.8934206959458 1991 1.8186960215692 1992 1.75750232633618 1993 1.75002372184569 1994 1.754685402404 1995 1.69240749136772 1996 1.65271651937728 1997 1.61824736203377 1998 1.56217699205268 1999 1.50433739318335 2000 1.45790187647314 2001 1.48389425307118 2002 1.3988328763027 2003 1.32275076403145 2004 1.36315757853758 2005 1.34757906352043 2006 1.29658908503988 2007 0.796771832584536 2008 1.26560336535681 2009 1.3803027157145 2010 1.51943093763293 2011 1.46777416449143 2012 1.27471801981307 2013 1.28441474668 2014 1.3490889002021 2015 1.33411577030414 2016 1.34542593504869 2017 1.29675571220462 2018 1.35360298648434 2019 1.42969688109789 2020 0.970386031353162 2021 0.910444902564511 2022 0.984586244469359 2023 0.406430370277168