*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970003014
1970004004
1971000011
1972000022
1973000000
1974000011
1975000000
1976001001
1977001012
1978003014
1979024006
1980114006
1981014016
1982003014
1983002002
1984002024
1985002002
1986014005
19870390113
19880370010
198907100320
199001770125
199149110125
1992125101138
1993051130165
199411221901143
199521082200132
199611141702134
199711402501167
199811481900168
199911111300125
200011532402180
200121361903160
200202503502287
200303423202376
200413502400375
200532162801248
200603555100406
200703424800390
200812915303348
200911848300268
2010234010200444
2011113311201247
201222833400319
201303438000423
2014159910500705
2015017280045
2016002002
2017001001
Total28519710801376343