*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19771
19780
19793
19800
19811
19820
19830
19842
19859
19861
19872
19881
19892
19902
19910
19921
19931
19942
19954
19962
19970
19981
19994
200046
20014
20024
200326
200431
200525
200672
200737
200812
20098
201011
20115
201219
20131
20142
20150
20161
20170
Total345