*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970009009
1970000000
1971000000
1972002002
1973000000
1974001001
1975001001
1976001001
1977003003
1978001001
1979000000
1980011002
1981014005
1982100001
1983000000
1984000000
1985102003
1986000000
1987013004
1988002002
1989004004
1990204006
1991323008
19926050011
1993206008
19941390013
19953070010
1996104005
1997108009
1998006006
1999108009
20001090010
2001216009
200210120013
200316220029
200410170018
200500240024
2006108009
200702210023
200800300030
200941400045
201020400042
201142340040
201242790085
20132012500127
20140011500115
20151015000151
20161019700198
20173122400228
20180022000220
20192123600239
2020000000
2021000000
2022000000
Total52241703001779