*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19931
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20045
200513
20060
20071
20081
20090
20105
20112
20124
20130
20140
20150
20160
20177
20181
20190
20200
20210
20220
20231
20241
Total44