*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19761
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19911
19920
19932
19943
19951
19960
19970
19980
19990
20000
20010
20020
20030
20040
20053
20060
20070
20081
20091
20102
20110
20120
20130
20142
20151
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total22