*Excludes Observations that spanned multiple years

Pre 19701
19701
19711
19720
19730
19740
19750
19761
19770
19780
19794
19800
19810
19820
19834
19842
19850
19867
19872
19880
19890
19900
19914
199212
199323
199414
199516
19969
199718
19983
199943
20000
20017
20027
20036
20041
20058
20065
20071
20082
20090
201029
201134
20123
201315
201419
201514
201621
201747
201851
201940
202043
202131
202241
202392
20241
Total683