*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000106263
1970001012
1971000044
1972000055
1973001067
1974000033
1975001056
197600101011
1977002079
1978001056
1979002068
19801030812
19810020810
1982001056
19830020911
198400101213
198500201113
198600301316
198702401016
198801101315
1989031201126
19901441919
199124170932
199224701326
19933171001444
19943311001761
1995155711579
1996033901355
1997021401742
1998228801149
1999011801231
20001511602189
20011131201743
20020591901492
200316818018105
20041411302176
20050312611977
200605929020108
200718242022147
20081343801689
2009213440665
2010237500998
201103060021111
201203565012112
2013131611296
20143723401110
201524150021
2016013026
2017101002
Total3287567145652147