*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197046044054
1970300205
1971500005
1972400105
1973400105
1974600208
1975701109
19767003010
19778007015
19786007013
19798004012
19808006014
198111004015
198212003015
198311002013
198413003016
198511001113
1986100010323
1987130013228
198817005224
1989120013732
1990130062241
199190225743
199291114631
199315104044100
199421026198182
199514123772126
199612035780152
1997201485163273
1998180442240304
1999200339132194
2000240355191273
2001280349182262
2002180394219334
20031701108243369
2004200181284386
20052905175166375
20062604177221428
20072122153164342
2008208130245376
2009410324670360
2010290128830348
201145123822432
20128014118123299
2013131111744203
201410010542148
201561149764
201640012016
2017101305
2018000000
Total7964159313227726800