*Excludes Observations that spanned multiple years

Pre 197078
19701
19710
19720
19730
19742
19751
19761
19772
197813
19790
19800
19812
19822
19836
19847
19855
19869
19876
19885
19893
19904
19910
19925
19937
19946
19954
199613
199717
19989
199915
200027
200125
200210
200352
200444
200594
2006144
200725
20080
200958
2010147
2011121
2012111
201359
201452
201572
201658
201742
201843
201955
202038
202160
20224
20232
20241
Total1567