*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970221805072
197003110216
1971015017
1972002035
19731070311
19740260311
1975010056
1976021058
19771230410
1978002068
19790110810
1980010056
198100110516
19820140712
19830020810
1984002057
19850210912
19860020810
19870290617
1988433301050
1989062301039
199005320744
19912122601151
199238280645
19935113901065
1994661118012197
1995230206110249
199623623407279
199766762014149
199847146010167
19992244101582
2000421154020199
20018785014114
200223172015192
200331182019115
2004113164016194
200521569014100
200621595014126
200741097013124
200823377210124
20093114201773
20102476008117
201144251016113
201227258121154
201359972020196
20147112123024266
20158135130041314
20164175150034363
20179196156037398
20185200112032349
201913177132017339
202011256189027483
202115237210025487
20225265165027462
202349290244
202400110112
Total1652451376047497129