*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010926945
19700007310
1971002305
1972000112
1973000325
1974000325
1975000101
1976000112
1977000505
1978000235
197900012214
1980001449
1981002215
1982001113
1983000617
1984000325
19851027616
198610514727
1987101015127
1988206141234
19890120411375
199000358244161
1991002212749198
1992009010856254
19930078211128417
19940048133124305
19950043171139353
19961052168136357
1997102712298248
199800508061191
19990086247117
2000006362163
20013010423085
2002108452680
200300916732
20040019191755
20050010202252
200600511925
20070059216
200800116522
200900410822
201000511723
201100210315
2012000617
2013003104
2014004313258
20150028515
201600102719
2017000617
2018000000
Total121653171611263508