*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19911
19921
19931
19940
19959
19969
19973
19984
19996
200010
20015
20022
20032
20045
20054
20065
20077
20086
20097
20109
20118
201216
201316
201415
201514
201618
201711
20189
201914
20209
20219
20229
20230
20240
Total252