*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000101
1970000000
1971000000
1972000101
1973000101
1974000101
1975000000
1976000000
1977000101
1978000101
1979000101
1980000011
1981000000
1982000202
1983000101
1984000101
1985000404
1986000202
198700014115
198800015116
198900016117
199000131115
19910005510
1992001596102
19930003317320
199400118934953
19950015903909
19960013895899
19970008545553
19980004693697
19990006107113
20000008849857
200100110405416
200200010874884
20030007354361
20040006888894
20050006243249
20060004334338
200700014646660
200800016259275
200900015217
201000155182238
201100041132173
20120001192193
20130009207216
20140005251256
2015000505
2016000066
2017000000
2018000000
Total0073341033410675