*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701370011
1970005005
1971012003
1972000000
1973002002
1974003003
1975022004
1976007007
19770280010
1978013004
1979026008
19800490013
1981009009
1982017008
1983007007
1984005005
1985216009
19860690015
198702100012
198808100018
1989215170034
1990329220054
1991514200039
1992111170029
1993033350068
19941566100118
1995337400080
19963366400103
19970456500110
19980408000120
19991418700129
20000269700123
200101313500148
200201212300135
20031614600153
200441417700195
200512613600163
200602314500168
200732914700179
200816015100212
200979218200281
201039718900289
201126315000215
2012217118100354
2013731127800596
2014227132200595
2015026335700620
2016331251200827
2017736654900922
201814467537001018
20196539588001133
2020131970039
20210790016
Total9835775743009418