*Excludes Observations that spanned multiple years

Pre 197050
19700
19710
19720
19730
19741
19752
19763
197719
19780
19790
19802
19812
19821
19830
19840
19850
19861
19871
19880
19890
19900
19911
19921
19939
19940
199565
19969
199781
19980
19990
20001
20010
20020
20033
20040
20050
20060
20072
20080
20090
20100
20110
20120
20131
20140
20150
20163
20170
20180
20190
20200
20212
20221
20230
20240
Total261