*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000002323
1970000011
1971000055
1972000022
1973000022
1974001012
1975010012
1976002035
1977004059
1978003058
1979003047
1980006028
1981003036
1982001034
1983001045
1984001045
1985001034
19860060713
1987004059
1988003036
19890240410
1990033039
19910150410
1992012036
1993023049
199417110423
19950390214
19961490418
19970750618
19980440513
199901230419
20000470617
200104110419
2002016140232
200303760346
200402250431
200503100518
2006159121174
200704131624
200805171528
200907151124
201002180121
201100150217
201201100213
201301090322
201408100018
2015009009
2016001001
2017002002
Total32292814174691