*Excludes Observations that spanned multiple years

Pre 19704
19701
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19890
19900
19911
19920
19931
19940
19950
19960
19971
19980
19990
20000
20010
20020
20032
20040
20056
20060
20073
20084
20091
20100
20110
20121
20131
20141
20151
20160
20171
20182
20194
20200
20210
20220
20230
20240
Total37