*Excludes Observations that spanned multiple years

Pre 197048
19702
19710
19720
19730
19740
19750
19762
19775
19780
19796
19808
19817
19823
19830
19848
19850
19860
19870
19881
19890
19900
19911
19921
19932
19947
199516
199617
199720
199856
199918
200017
200115
200211
200318
200449
200581
200623
2007229
2008157
200975
201052
201134
201237
201330
201415
201525
201614
20173
20189
20198
20207
202110
202215
20235
202413
Total1180