*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19708002010
1970000101
1971000000
1972100203
1973100102
1974000156
1975300126
1976500319
19773006312
1978200428
19792019012
19806013010
19816005112
198260110118
1983200406
1984400206
19855008316
1986300339
198730213220
198860210624
198960581130
1990602121636
1991803211850
199260013928
199390434956
19941204393085
19951207411777
19968012323082
1997905552695
19989025932102
19991201561786
20001404461478
200190342963
2002802894103
2003807866107
20041101691394
2005130111128144
2006120121296159
20071605777105
20086131225137
20095052013214
20103032844294
20115033218337
201215032415264
20132011563162
201400034135
201500220022
2016000202
2017000101
2018000000
Total290111724903403238