*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19831
19840
19850
19860
19870
19880
19890
19900
19911
19926
19932
199410
19952
19964
19975
19983
19992
20001
20012
20023
20031
20048
200522
200614
200786
200819
200929
201013
201112
201220
201315
20140
20151
20161
20171
Total288