*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010505965
1970003036
1971001056
1972000044
1973001023
1974001045
1975000022
19760130812
19770050813
1978004037
1979212701040
198020100820
198160701326
198200401317
19830090716
19840060915
1985111058
1986041101126
1987221921742
1988151901641
1989131101429
19903123201360
19914103701263
19921104401570
199331995013130
199415478021154
19951206101496
199644269017132
199712288019130
1998157126019203
199912081020122
2000027166023216
2001110139024174
200203138017158
200303197114215
200423200019224
200514181018204
200613248119272
200704219032255
200808266620300
200911226907289
20101933205347
2011114427118461
201214226644281
20130414916160
2014017650183
2015220610285
201621110014
2017005005
Total494294157186535306