*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197034048046
1970200507
1971101305
1972400105
1973100012
1974100023
197530012217
197670029541
197790017935
19788003415
1979900181037
19809005761127
19811601183065
19821401124875
19831500153060
19841100152955
198580092340
198670081328
1987700132747
1988813103961
1989710102341
1990101452040
1991511132242
199270542238
199391261634
1994903111740
19951104292266
1996807232361
19971110172958
19981000292867
199980172743
20001205302471
2001902302566
2002603412575
2003703283674
20041303372982
20051002452784
2006801323778
200711035348115
200811016549126
200912016459136
201013036745128
201117027212103
20121505591998
2013200046773
201400234743
201500312318
2016300407
2017000000
2018000000
Total436676112610342678