*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197085001086
1970300003
197110000010
1972500005
1973500005
1974400105
19757003010
19768002010
197711002013
19788002010
197910003013
198012002014
198114003017
198214006020
198311002013
198417001018
198512011014
1986170012029
1987170011230
198821004631
198915006728
19901611101846
19911413391370
19921101261048
1993170037963
19942710481894
19952102241057
1996120124845
19972501371174
19982011402082
1999250029761
20003101848124
20012601779113
2002160273798
200322018925137
200424005723104
200533126211109
2006241110913148
200724319516139
2008184110418145
200910021035120
201010001617178
201112001724188
201238005915112
2013500923100
201410141548
2015100491161
201640027132
2017000202
2018000000
Total793132418323202982