*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
199122
199216
199327
19942
19954
19967
199717
199810
19994
20007
20017
200210
20039
200430
20058
20061
20070
200811
200928
201018
20112
20129
20137
20144
20151
20161
20170
201837
20192
20206
20213
202242
20235
20240
Total362