*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197074032079
1970300205
1971700007
1972400004
1973400206
1974500207
1975500308
197610004014
19776009015
1978400408
1979120011124
198090112022
198111007018
19828007015
19837004011
19847006013
1985300418
1986100210123
1987162115337
1988170015234
1989130018940
1990701283672
1991204332160
199260129642
19931307402989
199416039472185
199570115061129
199680125560135
19971001021388321
1998120717090279
199990417640229
2000140423043291
2001150725920301
200250130923338
2003901039733449
2004906416100531
2005120636994481
20061401641543488
2007180234355418
20088110276109404
2009106358120485
2010106396152555
2011903433116561
20122001254180455
201330224570320
201400014125166
20150016936106
2016000381048
2017000022
2018000000
Total4633148597317518338