*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19911
19921
19930
19940
19950
19960
19970
19980
19991
20000
20010
20020
20031
20040
20050
20060
20070
20080
20090
20100
20113
20121
20134
20140
20150
20160
20171
20180
20191
20200
20211
20220
20230
20240
Total22