*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
200448
200580
200623
2007229
2008157
200975
201051
201134
201237
201329
201413
201525
20163
20171
Total1094