*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010501622
1970001023
1971000044
1972000022
1973000033
1974070029
19750510511
19760320510
19770680216
19780340411
197922120420
19800090716
198102110417
198221130521
19830190313
198400110516
19851650719
198613130623
198724111624
198844110928
1989310100932
1990317220749
1991911380462
1992010460359
199369600883
1994132969017128
1995815470878
19961323320472
199723060015107
19983275301093
19990133711465
20001114101568
2001494901375
200222650978
200335780894
20041156601193
200531099014126
200646118013141
200723101014120
20080011708125
20096323203244
20102526002269
20110630005311
2012111212013237
20130317804185
201402410043
201511230126
2016006006
2017001001
Total103333258723333358