*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974200002
1975000000
1976000000
1977001001
1978000000
1979000000
1980000000
1981000000
1982000000
1983010001
1984000000
1985100001
198620230025
198718140023
198854020056
198952050057
199085040089
1991221740043
1992341710052
1993231350041
1994211370041
1995211470042
199632780047
199765750077
1998418110060
199968670081
2000509150074
20014010230073
2002428190069
2003622130077
200422180031
2005322110045
2006161340033
200723390035
2008192140035
200960100016
201018480030
2011123100025
20124330010
20139360018
2014122120026
201583100021
2016114160031
201763280037
201811100012
201910150016
20201180010
202120190021
202210150016
2023000000
2024000000
Total957183360001500