*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700690015
1970000000
1971071008
1972000000
1973001001
1974012003
1975001001
1976000000
1977002002
1978011002
1979000000
1980001001
1981002002
1982000000
1983100001
1984000000
1985001001
1986000000
1987000000
1988001001
1989001001
1990000000
1991000000
1992002002
1993001001
1994010001
1995003003
1996012003
1997004004
1998005005
1999002002
2000013004
2001006006
2002001001
2003026008
200400100010
200502160027
2006018009
200705210026
20080570012
2009063009
20100680014
201102140016
2012022004
201301870025
201401060016
201506190025
2016015140029
201709290038
2018017150032
201902780035
2020000000
2021000000
2022000000
Total117023500406