*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19861
198711
19882
19894
199031
199113
19927
199320
19947
19956
19962
19971
19981
19994
20006
200118
20025
200314
200412
20056
200610
200726
200811
200917
201010
201112
20127
201313
201410
20158
20168
20174
20185
20190
20200
20212
20220
20232
20240
Total317