*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19840
19850
19860
19870
19880
19890
19900
19913
19920
19930
19942
19955
19967
19974
19989
19990
20000
20010
20020
20030
20040
20050
20060
20070
20089
200913
201021
201111
201214
20139
201410
201510
20164
20170
20180
20190
20200
20211
20220
20230
20240
Total134