*Excludes Observations that spanned multiple years

Pre 19705
19700
19711
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19830
19840
198513
198629
198735
1988151
19893
199012
199155
199213
199315
199422
199552
199616
199719
19981
199963
200070
20017
200210
20030
20040
20054
20062
20070
20083
20092
20107
20112
20123
201315
20145
20157
20165
201710
201810
201911
202026
202124
20229
20230
Total738