*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700010114115
1970000044
197100001010
1972000077
1973000077
1974001067
1975000066
19760010910
197700101011
1978000099
197900101112
198000101011
198100001414
198200301518
1983002079
198400301013
1985000077
198601201821
1987021502138
1988021402036
1989062101845
1990122001437
199113701223
199214201623
19932131701951
19941531802092
19953111221745
1996142121965
1997229122020173
1998445135015199
1999030131015176
2000135158024218
200105118021144
20020110508114
2003011124013148
200403138020161
200513128019151
200634237015259
200707160124192
20082494116117
2009024118026168
201038194033238
2011010124032166
20120121733769
20130377221103
2014277911099
2015114101659
201601201215
201712301319
2018121015
20191410915
2020001023
2021000011
Total324102442118633758