*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
19880
19890
19901
19914
19921
19934
19941
19950
19962
19971
19982
19995
20001
20015
20021
200313
200414
20057
200626
200716
200838
200916
20107
20119
201213
20139
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total196