*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19702260111
1970011002
1971030003
1972000000
1973050005
1974000000
1975023005
1976003003
1977015006
1978061007
1979171009
19801540010
1981134008
1982041005
1983006006
1984003003
1985003003
1986053008
1987016007
1988041005
19890380011
199001230015
19916640016
199221070120
1993016130029
1994433190056
19951019170046
1996522280055
199728702300121
1998659150080
1999446300080
200037412400102
20016684201117
2002245350082
2003440150059
2004457330094
2005447290080
2006244330079
2007140310072
2008128320061
2009433500087
2010123510075
2011123450069
2012035520087
20131756500141
201431194300165
201511618100243
2016517311600294
2017219613700335
201821688500255
201991629500266
202014710049
202101240016
2022020002
Total16119841317033465