*Excludes Observations that spanned multiple years

Pre 197012
19700
19710
19720
19730
19741
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
198525
198613
198718
198830
198916
19906
199118
199213
19936
199411
199530
199626
199719
199820
199912
200016
200128
20023
200334
200421
200521
200621
200724
200817
200914
201014
201119
201244
201358
201431
201512
201627
201713
201821
201912
20205
202114
20223
20236
20241
Total756