*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970103307
1970000000
1971000000
1972000101
1973000101
1974100102
1975100001
1976000202
1977000101
1978000000
1979000101
1980000202
1981000000
1982100304
1983000202
1984000101
1985000303
1986000202
198700012012
19882006311
1989200305
1990000404
199100010111
199200113014
199300011213
199400011920
1995001171129
199600020626
199700012012
19980017715
1999001607
2000000241135
200100116118
200200026935
200300218424
200420191123
200510215725
200600018220
200700035035
200801019020
200900024226
2010100462774
201100068169
201200017320
201300017421
201400013417
20150037111
2016000112
2017000202
2018000000
Total12116530127686