*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19801
19810
19820
19830
19842
19850
19861
19876
198818
19899
199010
199117
199269
199352
199410
199521
19968
19971
19981
199937
200034
200115
20026
20032
20044
20050
20065
20071
200821
20096
20103
20115
20120
20132
20142
20154
20162
20177
20182
201910
20209
202115
202212
202334
202413
Total483