*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000011
1971000011
1972001023
1973002024
1974001012
1975001034
1976000033
1977003025
1978003025
1979002024
19800290213
1981002057
1982002046
1983004026
19840080412
19856080317
198601200425
198722140523
19881104301165
1989925801079
1990273283970
199193280545
1992103210539
1993421111129
1994111200941
199573211941
199605280841
1997121501129
199816120726
1999121601130
2000301201732
2001122301339
2002103101042
2003573801565
2004003301447
2005203201852
20061066401898
200741288016120
20085790019121
20091011101026148
201071477023121
20114484225119
2012135532789
201301978038135
20143143901369
2015162312051
2016011001930
201721802334
20180080311
2019015028
2020016007
2021010001
Total1481571286115132115