*Excludes Observations that spanned multiple years

Pre 19702
19700
19713
19720
19731
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
198610
198759
19885
19891
19901
199112
19928
199323
199417
199538
199644
1997130
19987
199926
20008
200115
20026
20031
20042
20052
20060
20073
20080
20091
20101
20113
20122
20131
20145
20150
20162
20173
20180
20191
20202
20211
20220
20231
20240
Total447