*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19704688034114
197001050217
197111030115
19720910414
197302200123
197404900150
19750891203104
19760692907105
19770861709112
197804230853
1979049180976
198002115709277
1981122118016256
1982115312014180
198309815015128
19840671501193
198505490871
198603280747
1987079130799
19883911018113
1989056101774
19904835110103
1991152131572
199256940785
199328161999
1994341110964
19954432901187
1996747230885
19970561711185
1998054290992
199914570861
20005503001398
2001257300998
2002343410693
2003360280798
200437537013128
200527145010128
200611403208181
2007319253011259
2008113865011215
2009121664022303
2010320767023300
2011212580026233
2012716265025259
2013020948028285
2014220439010255
2015325317013286
2016019817016231
201701967017220
201808422492
2019000011
Total784816117485416617