*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197076004080
1970400206
1971800109
1972600107
1973600107
1974400307
19758002010
1976700209
19779005014
19789002011
19799003012
198012003015
1981800109
198212005017
198311003014
198413004017
198510002113
198614009124
198715006324
1988160010430
1989130032752
199011016422
19911412191450
19921104201449
19931401205590
1994200130552603
1995172318583623
1996141123470509
19971701352881
1998130126353393
19991400142048
2000211348392465
2001190137238295
2002121140421475
2003130032195240
2004161025441483
20052010373088
2006181059225303
2007210354176254
200822018233138
2009121076132221
2010110413995249
2011440232262430
201224101661192
201380025913280
201430086493
201530031337
201600046248
201710016118
2018200002
Total6851130186745737166