*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
19872
19887
19892
19901
199113
19927
199314
19942
199524
19960
19970
19980
19990
20000
20012
20023
200312
20042
20052
20061
200712
20081
20092
20105
20110
20121
20130
20140
20150
20160
20171
20180
20190
20200
20210
20221
20230
20240
Total117