*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19704212604226
197044620153
197134610151
197246280276
197328420088
1974196400101
19750116702125
19767881602113
197781062402140
1978010615013134
197971171201137
1980101624603221
198171452404180
198291621302186
1983111822401218
198461993002237
198511482702178
19861148801158
19871181903194
198841851602207
19891161700169
19901174701183
199131041003120
19921127801137
199311381201152
19943149502159
199521101101124
19964118701130
19970126402132
19980126701134
19991229901240
200034013400438
200124333510471
200243992501429
200354576903534
2004740825010450
200544392601470
20061258054010656
200754723303513
200844502700481
2009145811300572
2010257516001738
2011042011401535
201214402300464
201304594300502
2014394621100512
2015174819801597
20160518600524
20171548400553
2018001001
Total21412553128219314143