*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000108586
1970000033
197100001010
1972000055
1973000055
1974001045
19750030710
19760020810
197700201113
19780020810
197900301013
198000201214
198100301417
198200601420
198300201113
198400101718
198510101214
1986001201729
1987021101730
198806402131
198907601528
19901181011646
19913133911470
19921102601148
1993093701763
19940184812794
19952102402157
1996182401245
19971113702574
19981204012082
1999072902561
20001884031124
20011977026113
2002277301698
200312589022137
200402357024104
200521162133109
2006113109124148
200711695324139
2008118104418145
200925103010120
201007161010178
201104172012188
201201559038112
2013039205100
201415410148
2015011490161
201601270432
2017002002
Total243201832137932982