*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
19900
19911
19920
19930
19940
19950
19960
19970
19980
19991
20000
20010
20021
20030
20041
20051
20060
20071
20082
20090
20101
20112
20123
20135
20143
20154
20164
20174
20184
20191
20200
20210
20220
20230
20240
Total39