*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19771
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19885
19890
19900
19910
19923
19930
19940
19959
19961
19971
19980
19991
20000
20010
20020
20031
20040
20050
20064
20070
20081
20090
20100
20111
20121
20130
20144
20150
201629
2017120
201840
201916
20200
Total239