*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197033000033
1970100102
1971100102
1972100102
1973200002
1974300104
1975300003
1976400105
1977500207
1978500409
1979400509
1980500106
19816027419
19827004011
1983400105
1984400408
19854007011
1986400307
19878007015
198810008119
1989140030145
1990131064886
1991700581479
1992600263567
199314103782134
1994160147193257
1995111345217277
199690038210257
199717013292142
19988002279109
1999110139253
2000180043148209
2001140140126181
200290074114197
200317255174149
200480153140202
20051510353081
20061500393589
2007150024172211
200811022570108
200940031237
20107035044104
20116007919104
2012900332365
2013100113951
2014101132237
20151008110
201600012517
2017000224
2018000000
Total391621111920043541