*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19912
19920
19931
19943
19950
19968
19972
19980
19990
20000
20010
20020
20030
20041
20050
20060
20070
20081
200916
201013
20113
201213
201328
20144
20157
201611
20170
20180
20190
20200
20210
20221
20230
20240
Total116