*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197040803446
1970005027
1971103015
1972001045
1973010012
1974020013
197502120317
197605290741
197709170935
19780430815
1979010180937
19800615709127
19811301801665
19821481201475
19830301501560
19840291501155
198502390840
198601380728
1987027130747
1988339101861
1989023101741
1990420511040
1991122131542
199252240738
199321661934
1994317110940
19954222901166
1996723230861
19970291711158
19980282901067
199912770843
20005243001271
2001225300966
2002325410675
2003336280774
20043293701382
20052274501084
2006137320878
200734853011115
200814965011126
200915964012136
201034567013128
201121272017103
20125195901598
2013074602073
201427340043
201533120018
2016004037
2017000000
Total761034112664362678