*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000204547
1970001045
1971001034
1972000044
1973000077
1974001023
1975001056
19760020810
1977000077
1978000066
197900101011
1980000055
198100001212
1982001078
1983001089
198400201012
19850120710
198600501116
198700601016
198802301015
198903501018
199006411122
1991110110729
1992023120944
1993127801248
1994112123014159
199511009212124
1996199807115
19970171601144
19980914013108
19990141101338
2000012019020159
20010671801297
2002111720112151
20030421001769
2004012910110150
20050162002157
20060261501556
2007010927016152
20080175121585
200913350443
2010019641488
2011017801190
2012004411459
201300510253
201401280029
201500181221
2016003003
2017001001
Total71181652104752325