*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19732
19740
19750
19760
19770
19780
19790
19800
19810
19821
19831
19840
19851
19860
19870
19880
19890
19900
19910
19920
19930
19940
19951
19960
19970
19980
19991
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20137
201427
20150
20161
20179
20183
20190
20203
20211
20223
20237
20240
Total70