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*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19741
19750
19760
19770
19780
19790
19800
19810
19820
19831
19840
19850
19862
19871
19881
19890
19908
19915
19923
199314
199411
19954
19965
19970
19985
19992
20006
20012
20023
200314
200425
20055
20061
20076
20084
200917
201013
20113
201210
20130
20144
20152
20167
20174
20181
20191
20201
20216
20224
20231
20240
Total205