Year % 1975 42.463326104561 1976 50.951352107327196 1977 477.58916101536306 1978 567.381568886036 1979 57.5051941399518 1980 47.5185449309344 1981 61.3610675060281 1982 41.9490601434319 1983 49.8594389583655 1984 49.7006868369712 1985 47.992992489042 1986 64.81107731510511 1987 73.8802952905946 1988 67.11247478829 1989 61.244367090305296 1990 52.6055197595419 1991 34.2979003807902 1992 26.8879706583706 1993 31.3000346454409 1994 29.773128811968803 1995 32.2791018709409 1996 39.381359627360304 1997 49.982824633441396 1998 42.855458119368 1999 45.533889362166505 2000 78.5825128192293 2001 75.1567410584785 2002 83.7283422804529 2003 78.8275889766352 2004 97.1894910012887 2005 94.8561891355869 2006 119.169118246552 2007 152.065318259979 2008 199.265064747836 2009 117.000861790469 2010 111.560835798517 2011 129.617436554226 2012 96.1935805387896 2013 133.896969770313 2014 110.660498862176 2015 113.822662099471 2016 105.44419599298 2017 92.8429265202522 2018 119.0166 2019 82.3379 2020 94.3288 2021 96.9267 2022 108.8775