*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19882
19890
19901
19911
19926
19932
19940
19952
19960
19970
19980
199929
200026
20012
20022
20031
20040
20059
200612
200711
200813
200913
20106
201110
20126
201314
201410
20156
201614
20176
20189
20199
20201
20212
20222
20231
20240
Total230