*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010207679
1970003025
19710010910
1972001078
1973001089
1974001056
19750030811
19760030811
197700301013
19780020911
197900801220
198001601320
198100401216
198200601723
198300301417
198400501520
198500501520
1986111301934
1987032301541
1988022001941
1989123701656
1990221511847
19916154101173
1992521123119259
1993963618121685
199461966370212030
199541934244221988
199621995301152043
1997068513329730
199811076201161114
1999110812123145
200011012381301082
2001285438129924
200231441602331539
200321009402241077
200451696401251767
2005228138125347
2006075857229846
200721387752301496
20083648119124795
2009284122113222
20100371255120647
20110255298144598
20120449125148623
201308046503548
2014121825511476
201514370042
201611870127
201702130015
Total641922324553188322656