*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19730
19740
19752
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19864
198727
198817
198911
19907
199118
199212
19936
19945
199591
199650
199733
19983
199954
200032
200118
200211
20039
20048
20059
20069
20079
200812
20096
20106
20112
20121
20134
20145
20153
20166
20174
20187
201911
202011
202128
202222
20237
20245
Total589