*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19800
19810
19821
19830
19840
19850
19860
19874
19880
19890
19900
19913
19922
19933
19940
199510
19969
19970
19980
19991
20001
20011
20020
20030
20043
20053
20064
20074
20081
20090
20109
20115
20123
20132
20143
201510
20163
20173
20180
20192
20203
20215
20221
20230
20240
Total101