*Excludes Observations that spanned multiple years

Pre 197010
19701
19714
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19850
19860
19870
19881
19890
19900
19911
19922
19930
19940
199522
19964
19977
19980
19991
20000
20010
20020
20030
20040
20050
20060
20070
20087
200911
201019
201123
201263
20139
201416
20159
201631
20171
20182
20190
20201
20210
20220
20230
20240
Total246