*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19843
19851
19860
19870
19883
19892
19906
199113
199215
19935
19946
19957
19966
19977
19988
199912
20004
200111
20024
200315
200416
200517
200624
200711
200829
200917
20108
20119
201210
20135
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total275