*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19704440012
1970000000
1971010001
1972000000
1973011002
1974000000
1975031015
1976001012
1977003014
1978010001
1979010001
1980011002
1981011002
1982013015
1983010012
1984000000
1985010001
1986042017
1987113005
1988025007
19890730010
199042010025
199121690027
199216180126
1993023190042
1994119160036
1995221310054
1996024140038
1997113300044
1998215390056
1999211150129
2000115420058
200109360045
2002011500061
2003230380070
2004021380059
20052873701127
2006254290085
2007013430056
2008013490062
2009216610079
20104806800152
2011029570389
20120984704149
20134813800123
201441153800157
201571506302222
2016319311600312
201711685700226
201812619400356
201922709600368
2020222311500340
202112519200344
202222356100298
202301590024
202406200026
Total60264216140184334