*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19704225604239
197045320160
197135210157
197246980283
197328920093
19741102400107
19750123702132
19767961602121
197781162402150
1978012115013149
197971291201149
1980101724603231
198171642404199
198291771302201
1983111962401232
198462173002255
198511782702208
19861187801197
19871226903239
198842151602237
19891199700207
19901248701257
199131271003143
19921148801158
199311791201193
19943198502208
199521451101159
19964172701184
19970162402168
19980167701175
19991360901371
200035533400590
200127263510764
200245232501553
200355976903674
2004750225010544
200545612601592
20061272354010799
200756013303642
200846332700664
2009167311300787
20102982160011145
2011078811401903
201211230025
201301430044
20143938100087
20151718801107
2016003003
2017111003
Total21412916126419314488