*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
19912
19922
19933
19942
19951
19962
19971
19987
19990
20001
20012
20021
200310
20049
200515
20065
20071
200814
20093
20101
20110
20123
20130
20141
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total87