*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19740
19750
19761
19772
19782
19790
19800
19810
19820
19831
19840
19851
19860
19870
19883
19897
19905
19918
199212
199314
19944
199537
199648
199747
199823
199915
200025
20011
20026
20038
20042
20058
200610
20070
20080
20092
20100
20110
20121
20130
20142
20150
20161
20172
20180
Total299