*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197099260145
19700370010
1971203005
1972011002
1973023005
1974023005
1975001001
1976011002
1977005005
1978032005
197902120014
1980144009
1981212005
1982111003
1983016007
1984023005
19852670116
198657140127
1987101150127
1988612140234
19892013411075
199035448200161
1991224912700198
1992905610800254
19937812821100417
19944812413300305
19954313917100353
19965213616801357
1997279812201248
199850618000191
19998476200117
2000621360063
20011030420385
2002826450180
200397160032
20041917190055
20051022200052
200659110025
20075290016
200815160022
200948100022
201057110023
201123100015
2012016007
2013301004
2014432130058
20152580015
201610720019
2017016007
Total653112617161123508