*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700040812
1970002002
1971000022
1972000000
1973002013
1974000011
1975001001
1976003003
1977004004
1978000011
1979002002
1980002002
1981001012
1982005038
1983003003
1984001012
1985002035
19860080210
19870370313
1988026019
19890240410
19900760316
199102190324
199223190428
1993043170262
199422382308271
199502023004236
199622343601273
19970982805131
199802602604290
1999043180465
200002083204244
200102223303258
200201993601236
200312623201296
200402213002253
200511093102143
20062885602148
20071915701150
20080506900119
20090289900127
2010410711800229
201117017000241
20121824601130
201351273701170
2014073210094
201504310035
20162630011
2017000000
Total24308411800874375