*Excludes Observations that spanned multiple years

Pre 19706
19700
19710
19720
19730
19742
19750
19761
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19905
19913
19920
19935
19942
19954
19962
19970
19981
19990
20000
20010
20020
20030
20040
20050
20060
20070
200823
200938
201043
201118
201220
201322
201426
201521
20166
20172
20180
20190
20201
20210
20224
20232
20245
Total263