*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19750
19768
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19872
19881
19890
19902
199111
19921
19930
199410
19957
199624
19975
19983
19990
20000
20010
20020
20030
20041
20050
20061
20070
200825
200965
201066
201129
201230
201339
201438
201533
201623
20170
20181
20190
20200
20210
20220
Total430