*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19862
19870
19880
19892
19901
19910
19920
19932
19945
19950
19960
19970
19980
199918
200010
200121
20021
20032
200430
20050
20060
20072
20081
20092
20101
20113
20120
20130
20141
20150
20167
20170
20182
20190
20200
20211
20222
20230
20240
Total116