*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970102058
1970004004
1971001001
1972001001
1973002002
1974001001
1975012036
1976004059
19770080513
1978005049
197900130720
19801160715
19810060713
19820080614
198300301114
198400301417
198501401419
19860390517
198703101317
19882370719
19890190515
199031590835
1991923250663
1992748516103
1993145220218277
19943135731113883
1995597747114864
19963120581016720
19971139113117271
1998313366011393
19991233001367
2000150539016606
2001225341016384
2002337443114498
2003760525016608
20042133659016810
20053147126022298
2006158342222425
2007657409415491
200811173241220474
2009493351018466
20106140494128669
20110195467131694
20124294253477632
2013224836215618
2014113621902358
20151139000104
2016112450462
2017023005
Total98245189893254212112