*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970021007284
1970003036
1971000077
1972001067
1973002057
1974000033
1975003069
197600301013
197700701219
19780030912
19791390922
1980214100834
198100201315
198200501318
198300501419
198400501318
198500501419
198600501419
198701701018
1988101101224
1989071301737
19900341511969
19910182111252
1992012301236
19931243101672
1994311029015157
1995640326011446
1996129730013152
1997591220018955
1998861227013660
1999141428010453
2000363632121693
2001180523017846
2002191067010988
200311195390101245
200451332450161398
20054840104018966
200649901250111130
200761083920191200
20082652149715825
20095548179016748
2010101293157091469
201179392561211224
201231269850121369
2013033713104472
201403179500412
2015028380167
20160280313
2017013004
Total921582919871161218531