*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19992
20000
20012
20020
20031
20042
200513
20062
20073
20081
20098
20104
20116
201212
201311
201414
201518
201614
201712
20180
Total125