*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001012
1970002002
1971001001
1972001001
1973001012
1974001012
1975002024
1976002013
1977002024
1978001001
1979001001
1980002013
1981001012
19820080210
1983001001
1984005005
1985012025
1986034007
198704160121
198801210224
198903280132
199011860025
1991113110025
199211541600171
199314071200420
19942168617021707
19950191414021930
19961169423021720
199704021602420
19980607801616
19990153900162
20004111223011140
200108922102915
20020152738011566
20031107820011100
20041172521031750
200503502500375
200608464214893
200707735001824
200804445600500
200901199200211
2010048513500620
2011030016703470
201203352100356
201374946800569
201404863200518
2015015220037
201602940033
2017050005
Total2018075107214319211