*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970100203
1970000101
1971000101
1972000101
1973100102
1974000000
1975000202
1976000202
1977000101
1978100203
1979000101
1980000112
1981100001
1982000101
1983000101
1984000101
1985101204
1986200507
19873006110
1988000516
19892007514
19904004614
19911038416
1992002125569
199310168088
199450015400420
199530111407422
19960005312317
19971018129139
19983015319328
199910084049
200020010275287
2001200127892
200200112227240
200330145361
20041007264272
200500012115127
20062014114121
20073008114125
2008000186583
200900017825
20100003765102
2011111163453
201210014345
201300087583
201400035659
2015000000
2016001157
2017000000
2018000000
Total4611529533513708