*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19852
19860
19870
19880
19890
19900
199126
19924
199310
19942
19953
19962
19970
19981
19994
20005
20010
20021
20031
20042
20050
20061
20071
200830
20095
20100
20112
20120
20133
20140
20150
20162
20170
20181
20190
20200
Total109