*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002002
1970005005
1971001001
1972001001
1973001001
1974001001
1975000000
1976002002
1977003003
1978002002
1979016007
1980004004
1981004004
1982009009
1983002013
1984003003
1985024006
198602110013
198704100216
1988015006
1989026019
19900770216
1991021290050
199211592100181
199316112203637
19943219832002233
19950206330002093
19960195624001980
199706102002632
19981121034011246
1999041170159
20004144847011500
200109024601949
20020159737001634
20031109538001134
20040191332021947
200521914001234
20061102155011078
20071147987011568
200808177900896
2009018710100288
2010240016500567
2011058218001763
201217559700853
201310890209011110
20140101199001110
2015012430055
201601720019
2017032005
Total2823208167702224935