*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970202307
1970000000
1971100001
1972100001
1973000101
1974000167
1975200114
1976100203
197710010314
19780007310
1979001629
1980100405
1981100416
198220010012
1983100506
1984200204
1985001337
19860019515
19872016615
19881029315
198910691026
1990202211136
1991007341556
199210032740
1993105501167
1994006382165
199530940759
1996209302364
1997304472377
1998303411663
1999502381156
200020133844
200130240651
200220163369
2003201079596
2004109662096
20052081026118
20060021037112
200741188599
20081001001102
20090041893196
20102022414249
20111073339350
20121022595267
20130001875192
201400149353
201500021122
2016000202
2017000000
2018000000
Total60111124182792869