*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19862
19871
19880
19890
19902
19918
19920
19930
19949
199511
199611
19971
19980
19990
20000
20010
20020
20030
20041
20050
20062
20071
20080
200913
201036
201118
201213
201320
201419
201516
20166
20170
20180
20190
20200
20210
20220
20230
Total193