*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19750
19760
19772
19782
19790
19800
19810
19821
19830
19840
19852
19860
19872
19887
19891
19905
19911
199218
199318
19949
19957
19962
19970
19983
19994
20002
200114
20026
20033
20043
20050
200631
20075
200815
20096
20107
20114
20122
20131
20140
20151
20161
20170
20181
20194
20202
20214
20224
20231
20245
Total211