*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
19883
19890
19900
19910
19920
19939
19940
19950
19960
19970
19980
19990
20000
20010
20020
200310
200412
20052
200615
200717
20087
20098
20108
20118
20121
20131
20145
20151
20163
20171
20181
20193
20200
20210
20221
20230
20240
Total116