*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000204951
19700390214
1971014016
1972002035
19730070310
1974006039
1975000055
1976000055
1977121048
1978002068
1979001078
1980010056
19810090514
1982004059
1983001089
1984001056
19850200911
1986001089
19870180615
1988023001042
1989051601031
199005310743
19912112601150
199237270643
19933104001063
1994658112012188
1995126204110242
199613523107274
199766359014142
199827142010161
19990223801575
2000220144021187
2001337501495
200203168015186
2003277001897
200415154014174
2005194701370
20062106501491
2007187801299
20082216729101
200930350644
2010121570079
2011325410372
2012015121230
201313520056
201431390043
201510110012
2016011013
2017101002
Total52413213144033003