*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19912
19920
19930
19940
19950
199621
199779
19984
19990
20000
20010
20020
200310
20040
20050
20067
20079
200815
20097
201013
201113
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20231
20240
Total182