*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002002
1970000000
1971000000
1972000000
1973000000
1974010001
1975011002
1976000000
1977002002
1978000000
1979020002
1980001001
1981001001
1982001001
1983001001
1984000000
1985002002
1986101002
1987020002
1988020002
1989134008
1990150006
1991040004
1992022004
1993021003
199401640020
199505670063
1996222100034
19977941200113
199844470055
199962980043
200008980097
20011151400156
200201723200204
200351783100214
200412777300351
200522157600293
200611964400241
200703951600411
200812632000284
200901312300154
201022552800285
201104655500520
2012257810000680
201301293800167
201405030053
2015042006
2016009009
2017000000
Total373833629004499