*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
19900
19910
19921
19930
19940
19950
19960
19970
19980
19990
20000
20011
20021
200310
20046
20053
20062
20076
20081
20090
20101
20116
201210
20134
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total52