*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19704680018
1970002002
1971020002
1972001001
1973001001
1974000000
1975062008
1976014005
1977009009
1978014005
1979023005
1980006006
1981005005
1982002002
1983004004
1984022004
1985021003
1986041005
19872570014
19880770014
198919120022
1990321210045
199111060017
199239110023
1993118180037
1994059280087
1995337210061
1996538180061
199751272100153
199841162000140
199931032300129
200011072900137
200101452900174
200201335200185
200331593800200
200412804900330
200521388800228
200631609900262
2007417010400278
2008515212800285
2009211511700234
201038117200256
2011111917900299
2012621313100350
2013833019500533
2014832415300485
20151135918400554
20161439419900607
20171350523500753
20181558124700843
2019750527700789
20201064830100959
20216660389001055
2022766618201856
202300160016
2024009009
Total165752938700111565