*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000407983
1970002035
1971001067
1972001056
1973001067
1974003058
1975001089
19760030811
197700301013
19780010910
197900101314
198000201113
198100001414
198200701623
198300201214
198400601824
198501201417
1986011501834
1987041712143
1988002102142
1989042801951
19902221201652
199161958120104
199265727116107
19932142113025282
19944557202023786
19953572180224781
19963538212020773
19971227208031467
1998338563027478
199937947024153
2000048091034605
2001832970035442
2002239170022485
2003139581225504
2004254658028634
20052160140043345
20062411165030608
20070409156746618
200812252582137542
2009379293163439
20101125472078676
2011057330106844
20120153002190507
2013218481067568
2014016238127282
2015106101043160
2016035104397
2017115903899
2018001202840
201971331547
2020110100425
2021108009
Total776233512340153413007