*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970004026
1970001001
1971000011
1972000000
1973000000
1974000000
1975002002
1976002002
1977005005
1978000000
1979006006
1980005005
1981002002
1982002002
1983000000
1984000000
1985003014
19861380012
19871090212
1988126009
198924110118
199042860038
1991812120032
199204120016
1993320140037
1994155280286
1995428190051
1996531210259
19976812400111
1998262270394
1999234230059
2000067220291
20014812402111
2002160360198
200321116600179
200411083100140
200541048700195
200641467200222
20070437800121
200821411000126
200916614001208
201036220300268
201102333300356
201203723400271
201302010200122
201408110019
201503190022
2016021003
2017013004
Total62132018240203226