*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970013502662
1970001001
1971003047
1972002046
1973001034
1974000055
19750160310
1976003047
1977005038
19780040610
197900100515
198001100920
19811030610
1982001301225
19830060713
19840070613
198500501015
19861070715
198700130720
1988241701033
198904270839
19900980623
199109140730
1992244131969
1993217168011252
19942632133012779
1995250888115614
19960116876091253
1997036086014460
1998257115010598
1999033110852
2000361145017676
2001133039019389
2002148033011525
2003034447013404
2004152538014578
200504638016100
2006132344021389
2007457357114649
2008019858211269
200914854114118
20103184136014337
20112167104028301
20121245268030544
2013030336132399
2014179365039484
20151165291121668
2016418611063696
20171032111201671321
20185146741106800
2019322716384828
20202910940731178
202134142701971631
2022510182101782014
2023810133801651521
202439838036886
202502150219
Total7778451252712173122192