*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000202
1970000000
1971000000
1972000000
1973000000
1974000011
1975000112
1976000000
1977000202
1978000000
1979000022
1980000101
1981000101
1982000101
1983000101
1984000000
1985000202
1986001102
1987000022
1988000022
1989001438
1990001056
1991000044
1992000224
1993000123
199400041620
199500075663
1996002102234
19970071294113
199800474455
199900682943
200000088997
20010014151156
200200032172204
200300531178214
200400173277351
200500276215293
200600144196241
200700016395411
200800120263284
200900023131154
201000228255285
201100055465520
2012002100578680
201300038129167
201400035053
2015000246
2016000909
2017000000
2018000000
Total003762938334499