*Excludes Observations that spanned multiple years

Pre 197016
19700
19711
19720
19730
19741
19752
19760
19770
19780
19790
19800
19812
19822
19830
19841
19856
198635
198737
1988219
198943
199034
1991115
199230
199340
199418
1995102
199654
199790
199823
199926
200045
200111
200213
20034
20049
20051
200614
200731
20085
200915
20108
20118
20125
201315
20147
201514
201618
201724
20181
201919
202012
202121
202223
202356
Total1276