*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000204648
1970005038
1971001034
1972001012
1973005038
1974002024
1975004037
19760060511
19770080816
19780060511
197931120622
19804190822
1981201101225
1982101001021
198301100617
198401501117
19850150511
198613150928
198700170522
198821150927
198918290947
1990430480991
1991325600997
199259530976
1993102767010114
19941053100016179
199552478017124
19963396009111
1997333102014152
1998345118016182
199923286014134
2000631151016204
2001810134120173
200223149011165
2003316216010245
2004420254011289
200525159013179
2006212254113282
2007311216218250
2008124237417283
200921427803297
20108731605336
201141331106334
2012220116025163
20134530404317
201413611800155
201528620880
201600180624
2017016007
Total116570424984785421