*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970014005
1970001001
1971010001
1972000011
1973001001
1974211004
1975010001
1976031004
1977001001
1978011002
1979020002
1980000000
1981010001
1982003003
1983021014
1984020013
1985022004
1986009009
19870460010
19880490013
198936140023
1990417110032
199147140025
19929138200104
199383011000148
1994107219400276
199593517202218
199623412800164
19979494300101
199842511800147
1999121260048
200074715900213
20012179201112
200242814500177
2003153614300194
200434527100319
200553711800160
20064389500137
200744013400178
200829015100243
200922111000133
2010910216602279
201127612100199
2012111688600265
20131727211700406
20141828715800463
20152041422100655
20161848829500801
20172440521400643
20182938221700628
20193037826400672
20201244035300805
20211949131800828
20221049924600755
202313180022
Total333513851640810643