*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19767
19770
19780
19792
19801
19814
19820
19830
19842
19851
19860
19870
19880
19890
19900
19911
19928
199312
19945
19951
19960
199710
19980
19990
20001
200126
20020
200321
20040
20050
20062
20071
20080
20090
201041
201122
20122
201332
201413
201513
201644
201766
201863
201992
20200
20210
20220
Total493