*Excludes Observations that spanned multiple years

Pre 19709
19700
19711
19720
19732
19740
19750
19760
19770
19780
19790
19800
19810
19822
19833
19840
19851
19860
19873
19880
19891
19900
19910
19921
19932
19940
19952
19962
19971
19982
19991
20000
20010
20020
20030
20040
20050
20060
20070
20080
200911
20100
20111
20121
201310
20142
20150
20160
20173
20180
20190
20200
20210
20229
20234
20241
Total75