*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002079
1970001012
1971000022
1972000000
1973000022
1974060017
1975000011
1976021014
1977035008
1978023027
197902110215
1980003036
1981013059
1982004037
1983031037
1984003047
19851220712
19861440615
19872450314
19882250413
198927110727
199017140527
1991610321352
199206140424
1993711250548
1994424250760
199576310953
1996614200545
1997418380969
19984123301160
1999062401040
200026320949
200105270840
200201380746
200325410351
200407290743
200505620673
200616590975
200776510973
20083326914109
20093315201159
20102026302267
20113536405377
201273379012401
20131014900150
201400180018
2015107019
2016016007
2017001001
Total109207206722152600