Year annual % 1960 2.85714285714286 1961 1.70940170940175 1962 2.1008403361344 1963 2.05761316872425 1964 4.23387096774197 1965 1.93423597678913 1966 4.74383301707783 1967 10.6884057971016 1968 0.163666121112876 1969 11.2745098039219 1970 2.58804258797295 1971 0.215551652643419 1972 3.23428662488595 1973 12.9408133340937 1974 16.8761956821095 1975 8.44732842274659 1976 10.0695380302795 1977 9.73113276853737 1978 8.82352941179666 1979 14.8423081655328 1980 14.1097064496918 1981 8.79396984924597 1982 7.27640861779861 1983 4.41180807455269 1984 3.68874452760907 1985 10.8659529841192 1986 18.6879606879605 1987 53.3929532563242 1988 7.31328780803817 1989 0.769646742205996 1990 21.7399443397526 1991 25.9674625060223 1992 43.6661783854171 1993 143.51155848349 1994 368.478068706267 1995 235.558815073605 1996 -0.701887251452818 1997 7.14511160883929 1998 18.9753691994478 1999 98.7730914112164 2000 59.401686545079 2001 38.5862878872611 2002 15.5273989185702 2003 23.0022321778219 2004 9.98632511974878 2005 9.89800489561465 2006 11.2813043273975 2007 6.42627934470524 2008 14.6671427437912 2009 -0.133636646714877 2010 6.94108221639996 2011 17.7117796414558 2012 5.00686319367273 2013 1.92343604108305 2014 3.38341272749477 2015 6.89390359168238 2016 55.4123879763196 2017 21.9969430173304 2020 34.889784309078 2021 59.1196626251977 2022 52.446027276241