*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700040106110
1970001045
1971000099
1972000077
1973000055
1974001067
1975002057
197600201113
197700501217
197800301114
197900601521
1980012001334
198100901827
198200901524
1983001501732
198400501621
198501201316
198601701725
198705701830
1988041041836
1989051012036
1990128631553
19916151311651
1992231801437
19933101411947
19942432902397
19954123511971
19967303701690
1997428299124356
1998135222026284
1999134200020255
2000127317031376
200157351023386
200232355015375
2003813442019482
20042142433018595
2005292298019411
2006418450025497
2007030379326438
20082612371022332
20096179149022356
20100162147017326
2011141219020281
20120137237144419
2013061133210206
20140267801105
2015212230340
201601530458
2017006017
2018002035
Total6712665300288717532