*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970210140026
1970003003
197101000010
1972001001
1973001001
1974021003
1975023005
1976002002
1977025007
1978022004
1979033006
1980115007
1981013004
1982025007
1983015006
1984043007
1985122005
1986026008
198715100016
1988135009
19893870018
199022880038
199191550130
1992719180145
199315681800101
199442063000240
1995101062100137
199661541500175
199752732701306
199861882000214
199931941300210
2000112693000310
200172402701275
200223404300385
200365324000578
200438463800887
200564056500476
2006638010400490
200794709500574
200876058000692
20091533713400486
20101641219800626
2011522922000454
20121652614300685
20131767117000858
2014251148187001360
201550882258001190
201632811296001139
2017471134303001484
201833997368001398
2019541210375001639
2020181290505001813
202120977400001397
2022191161296001476
2023000000
Total5001718346360422323