*Excludes Observations that spanned multiple years

Pre 19704
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19811
19820
19833
19840
19852
198645
198749
198833
198956
199016
199137
199253
199381
199449
199592
199660
199750
19987
199918
200038
200122
200210
200319
200410
200510
200613
200715
200819
200911
201019
201119
201230
201324
201431
201526
201628
201732
20187
20192
20204
20215
202217
202312
20240
Total1080