*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970016018
1970000000
1971021003
1972000000
1973002002
1974001001
1975023005
1976013004
1977007007
1978001001
1979033006
1980031004
1981001001
1982008008
1983005005
1984002002
1985131005
1986027009
19870770014
19880870015
198906120018
199022490035
1991713200040
1992214110027
1993368200091
199431822700212
199531031300119
1996101271200149
199774931800518
199825093300544
199922801400296
200024583500495
200114111900431
200203746101436
200344215100476
200415613500597
200504549600550
200624616600529
200704618600547
2008020812700335
2009013613100267
2010124717700425
2011032224600568
20120762300001062
20133768458001229
20142856430001288
20155942616001563
201631053781001837
201761222767001995
2018101256904012171
2019713061052012366
20200910010
2021001001
Total891453966950421327