*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19730
19741
19750
19762
19771
19782
19796
19803
19814
19821
19833
19842
198513
198612
198714
198811
19898
199014
19912
199211
19936
19944
19958
19968
199731
199826
199939
200059
200164
200281
2003230
2004232
2005305
2006297
200759
200883
2009120
2010179
2011148
201260
201332
201430
201557
20169
20170
20180
Total2281