*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19901
19911
19920
19930
19940
19950
19963
19971
19980
19990
20000
20010
20020
20030
20040
20050
20061
20070
20083
20099
201033
201110
20126
20138
201413
20155
20162
20170
20180
20190
20201
20212
20222
20230
20240
Total101