*Excludes Observations that spanned multiple years

Pre 197022
19701
19710
19720
19732
19744
19750
19761
19770
19781
19790
19803
19813
19825
19839
19846
19858
198613
198717
198818
198914
199021
199114
199213
199312
199417
199510
199617
199710
199816
199916
200010
20019
20027
200311
200414
200522
200615
200722
200821
200933
201042
201144
201237
201343
201449
201555
201646
201729
201836
201933
202042
202141
202223
20235
20246
Total968