*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972001001
1973000000
1974001001
1975000000
1976000000
1977000000
1978000000
1979000000
1980000000
1981000000
1982000000
1983000000
1984000000
1985000000
1986000000
1987201003
1988310004
198910140015
199010000010
1991701008
1992600006
1993620008
199425010026
199523100024
199619070026
1997121170030
19985410010
1999630009
2000120003
200115810024
2002111210024
200381090027
200416020018
200523040027
200623120026
200740040044
200823130027
200933110035
201026000026
2011001001
2012011002
2013141006
2014013004
2015002002
2016002002
2017014005
2018001001
2019224008
2020001001
2021000000
2022000000
Total356578100494