*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
198522
198611
19871
198830
19890
19903
199135
19920
19938
19945
199512
19962
19973
19980
199910
20008
20012
20020
20031
20040
20051
20060
20072
20081
20096
20104
20115
20126
20132
20142
20153
20162
20172
20180
20190
20200
20210
20220
20230
Total191