*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970100517
1970000101
1971000101
1972000000
1973000101
1974000101
1975000202
1976000314
1977000606
1978000202
1979000628
1980000303
1981000303
1982000505
1983000404
1984000303
1985000101
1986000459
19870016310
19880006410
198900231116
19900005712
199100241420
199200052530
199300162734
19940011387101
199500094049
1996002126478
199700295465
199800188897
199900083341
200000213108123
2001000117283
200200016198214
200300218282302
200400217280299
2005000167187
200600059378437
200700023168191
20080012188110
200900253173228
20100025556113
20110003973112
201200017154171
201300027131158
201400334142179
201500111618
2016000055
2017000000
2018000000
Total102757528513454