*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970011057
1970002013
1971001012
1972001012
1973001023
1974001023
1975003025
1976002024
1977003047
1978002046
1979001045
1980001023
1981000033
1982003047
1983001056
1984005038
1985001034
19860371819
19870490619
198801120821
198915220735
199001341826
199128110425
1992017131940
199331031308127
199402742009303
1995331013012338
199631991407223
1997067701084
1998174110894
199901550323
2000143701162
2001069701187
200201161704137
20032931605116
200411631004178
2005016170841
2006245210977
20070762907112
2008026330463
2009014340250
20101514903104
20110445901104
201204450049
2013059220081
2014032110043
2015027009
2016005005
2017001001
Total20198754032242774