*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19901
19911
19920
19930
19940
199516
19961
19974
19980
19994
20000
20010
20020
20031
20042
20050
20060
20072
20080
20092
20101
20110
20121
20131
20144
20152
20162
20171
20180
20190
20200
20210
20220
20231
20240
Total47