*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
198711
198840
19892
199011
19916
199240
19936
19947
199528
19968
199716
19981
19998
20008
20017
20021
20034
20043
20057
20063
20070
200846
200938
20105
20113
20127
201315
20146
20156
20163
20171
20182
20193
20203
20216
202212
20230
20240
Total375