*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970203027
1970000000
1971000011
1972000011
1973001001
1974061007
1975011024
1976002013
197703100114
19780370010
1979126009
1980004015
1981014016
198200100212
1983005016
1984002024
1985133007
19861590015
19871660215
19882390115
198961090126
1990211210236
1991715340056
199207320140
1993511500167
1994621380065
199597400359
1996923300264
1997423470377
1998316410363
1999211380556
200018330244
200126400351
200213630269
2003105790296
2004920660196
20058610202118
20062710300112
200715881499
20080110001102
20094318900196
20102424102249
20117933501352
20122526201270
20130519100196
201413510055
201501230024
201601110012
2017002002
2018002002
Total11128024441602896