*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19831
19840
19850
19860
19870
19880
19890
19901
19912
19920
19932
19941
19957
19967
19970
19981
19991
20000
20010
20020
20031
20042
20050
20061
20072
20085
200910
201012
201115
201214
201318
201410
201512
20163
20170
20180
20190
20200
20210
20220
20230
20240
Total130