*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970100204254
1970000011
1971000033
1972010045
1973001056
1974002046
1975000044
19760030811
1977202140945
197852770874
19796831101092
198035540751
1981193401238
1982163401336
1983375801060
1984362301354
1985710301131
198658601534
1987311101429
19882451401558
198980801430
19902471911768
19912272901169
19921533001462
19932043311775
19942095501599
1995174801470
1996374701067
1997354701772
19984104601676
19997678015106
2000836001990
2001754201973
2002915001373
20031225101580
20041233001964
2005233601758
2006413611456
2007215542385
2008414232171
2009257101088
201032490559
20111711106125
2012313902467
201301380241
201402160018
201511140218
2016014027
2017203016
Total5311601284105802565