*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19704046225239
197010425360
197110315257
197220486983
197300228993
19740014102107
19752007123132
19762071696121
197720824116150
1978130015121149
197910712129149
1980301046172231
198140724164199
198220913177201
1983101124196232
198420630217255
198520127178208
19861018187197
19873019226239
198820416215237
19890017199207
19901017248257
199130310127143
19921018148158
199310112179193
19942035198208
199510211145159
19961047172184
19972004162168
19981007167175
19991019360371
200000334553590
200101235726764
200210425523553
200330569597674
2004100725502544
200510426561592
20061001254723799
200730533601642
200800427633664
2009001113673787
20101021609821145
2011100114788903
201200123125
201300043144
20140039103887
20151017881107
2016000303
2017001113
2018000000
Total93121412641291614488