*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197015100016
1970001001
1971071008
1972000000
1973000000
1974001001
1975012003
1976011002
1977011002
1978010001
1979000011
1980003003
1981002002
1982001001
1983011024
1984020002
1985031004
1986030014
19870490013
1988062008
19891780016
199001960126
199121620020
1992011140025
1993028130041
19943722800103
1995027290056
1996053190072
199731022000125
19980912100112
1999173220298
20003844000127
200121422500169
200201094400153
200322823702323
200403904100431
200501985300251
200651638701256
2007014112000261
200812879800386
200929215100245
2010215521400371
201105321900272
2012723217302414
2013633014800484
20141636920200587
20151149627200779
20161047229200774
20171358829200893
20181558337800976
201923704414001141
20205719593001317
20214788630011423
20223960253001216
20230650011
Total1418877499901314030