Year annual % 1963 9.917910447761194 1964 16.321542535134768 1965 8.830911107219986 1966 20.89992491687225 1967 9.510712859867807 1968 -4.605662899501762 1969 3.643312101910828 1970 11.770730907899049 1971 7.639016165096588 1972 11.769112889494297 1973 8.784010237348038 1974 51.99697512883711 1975 19.865853433820412 1976 11.455803228285934 1977 15.369231193622246 1978 23.11196126486939 1979 16.74451576565641 1980 4.4726335052370665 1981 3.0255499733274847 1982 11.746794747946605 1983 20.705823772278006 1984 34.51589061345467 1985 8.67987051707982 1986 6.059133417411759 1987 -3.981686429999372 1988 8.257037497142514 1989 0.9535754100971492 1990 -4.894753744608805 1991 13.09109031573444 1992 2.964267707357958 1993 8.370324205385192 1994 39.20954415285667 1995 7.305789207003333 1996 24.465764413469294 1997 8.903205525161109 1998 4.17649878594701 1999 1.006639805504637 2000 12.500065414076614 2001 20.381539353452848 2002 25.642584839909254 2003 21.593547337572627 2004 -3.597729756443936 2005 11.754519407502963 2006 9.834812508263434 2007 -1.2501668339844183 2008 -13.049596748267811 2009 42.13013798609375 2010 16.331685400488993 2011 12.918627408426463 2012 15.485940460592651 2013 8.197284542133524 2014 5.792406033767817 2015 10.39295164515671 2016 10.744514771784521 2017 4.326518657241794 2018 12.506914691222482 2019 4.365737612122511 2020 12.260792091974373 2021 36.4125142854465 2022 10.72051025054101 2023 -1.129117684883968