*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197011120014
1970050005
197101410015
1972040004
1973030003
1974010001
1975040004
1976011002
19770820010
19780425800100
197903110032
198003000030
198102110022
198201700017
1983070007
1984070007
1985030003
19860930012
1987050005
198802000020
198901910020
199002610027
199103120033
199203510036
199304710048
199405050055
199515260059
1996128100039
1997268220092
199813960046
199911250018
200005860064
200108130084
200201171600133
200331073500145
200402773300310
200511302900160
200601111100122
20070281700288
20082150900161
200911051300119
201001441700161
201104262100447
201204893400523
201301524300195
20140123700130
201501841400198
201631612200186
201742851800307
201802471900266
201912984400343
20200104000104
202103200032
2022000000
Total224702540005264