*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000506166
1970001012
1971001034
1972001056
1973000044
1974001023
1975000033
197600201214
197700501015
19780050813
1979110601229
1980110401126
198150701325
198290801532
198391401226
198430001417
198511301823
198631902235
198743601932
198874901838
1989211201530
19906132721462
199118123612087
19928233501581
1993671422150
1994132142025101
1995754022781
19968133601572
1997554912888
199813135201795
19993112601959
20003114702283
20018213803097
2002734002070
20038174302088
2004141155022102
2005151182021129
200623549125103
20071684922398
2008161975120131
2009173114128163
20101913140020192
2011157106022150
201213971048141
20131111107023152
20141420639020279
2015332543025126
20161842302166
2017102702039
201834150426
2019819130141
2020422019
2021001001
Total4275451605139153505