*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19704440012
1970000000
1971010001
1972000000
1973010001
1974000000
1975021014
1976000011
1977003014
1978010001
1979010001
1980011002
1981011002
1982013015
1983010012
1984000000
1985010001
1986042017
1987113005
1988025007
19890730010
199042010025
199121960027
199216180126
1993023190042
1994120160037
1995221300053
1996025130038
1997113300044
1998216390057
1999211150129
2000116420059
2001010370047
2002012520064
2003232370071
2004022390061
20052883301124
20062703000102
2007018400058
2008013500063
2009222620086
20104806700151
2011032580393
201201368004220
201381157800201
201442038000287
20151024216002414
2016532422600555
2017425013900393
2018141623200649
2019242025400676
2020021003
2021020002
2022010001
Total67272920100184824