*Excludes Observations that spanned multiple years

Pre 197014
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19863
19870
19881
19891
19900
19910
19920
19930
19940
19950
19960
19970
19983
19991
20004
20010
20023
20037
20046
20050
20064
20073
20081
20090
20100
20110
20120
20130
20140
20152
201612
20174
20189
20190
20201
20219
20222
20230
20240
Total91