*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19812
19821
19831
19840
19850
19860
19870
19880
19890
19900
19910
19921
19930
19940
19951
19960
19972
19981
19990
20000
20010
20020
20030
20040
20050
20060
20070
20081
20090
20101
20110
20120
20131
20140
20151
20160
20172
20180
20190
20202
20210
20221
20231
20240
Total22