*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000101
1970000101
1971000101
1972000000
1973000101
1974000101
1975000202
1976000303
1977000303
1978000213
1979000505
1980000404
1981000101
1982000606
1983000202
1984000505
1985000606
19860008311
19870007310
1988000538
19890009615
199000191424
1991002241036
199200314421
1993003211539
1994003375191
1995003265180
1996006204369
1997007184873
1998002196889
1999000123244
20000053375113
2001001194666
2002000355590
200300124114139
200400123147171
2005001365592
20060015282135
20070006578143
20080016380144
2009002841197
201000416345212
201100012035155
2012000213657
201300278383
2014001541469
201500011314
2016000213
2017000000
2018000000
Total0050115612322438