*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970106029
1970002002
1971001001
1972001001
1973004004
1974002002
1975002002
1976004004
1977008008
1978104005
1979002002
1980006006
1981005005
1982004004
1983004004
1984004004
1985007007
1986008008
198700140115
198800140014
198900150015
19902580015
199141290034
199200250025
199300280028
199400550055
199501480049
199600370138
199700380038
199800400040
199900440044
200001620063
200112700174
200200690069
200301760279
200403880091
200512900194
20060212600128
20070313300136
20081716200170
20092420001207
20101628700294
20110025901260
201201840202422
20130056601567
201424461300659
20150077200772
20160091102913
2017011180011182
2018001261011262
2019031537011541
2020011771011773
2021121922001925
2022011553001554
202301180019
2024000000
Total171091459701914742