*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970007007
1970000000
1971000000
1972002002
1973000000
1974001001
1975001001
1976001001
1977003003
1978001001
1979000000
1980011002
1981014005
1982100001
1983000000
1984000000
1985102003
1986000000
1987013004
1988001001
1989004004
1990203005
1991323008
19926040010
1993206008
19941370011
1995306009
1996103004
1997107008
1998005005
1999107008
2000107008
2001214007
20021090010
200316180025
200410110012
200500160016
2006107008
200702120014
200800170017
200931310035
201020320034
201142250031
20120190010
2013008008
2014003003
2015004004
2016001001
2017000000
Total382129600355