*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970112004
1970002002
1971000000
1972000000
1973000000
1974000000
1975012003
1976003003
1977006006
1978003003
1979003003
1980005005
1981003003
1982002002
1983001001
1984002002
1985011002
1986011002
1987126009
1988025007
19891890018
1990319160038
19911760014
19923790019
1993114140029
1994051210072
1995327180048
1996530160051
199751201500140
199841071500126
19993911800112
200011022500128
200101392600165
200201234300166
200331543400191
200412633400298
200521166600184
200631539100247
200741569700257
2008513312000258
2009210111000213
201037116000234
201118116900251
20120995400153
2013112712900257
2014030660096
2015012230035
2016011002
2017000000
Total5723501452003859