*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19723
19733
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19858
19863
198710
198841
198910
199058
1991116
199241
19935
19944
19951
19960
19970
19980
19992
20008
20015
20020
20033
200431
20055
20064
20072
200811
20097
20103
201114
201220
201316
201423
201518
201631
201718
201830
20190
Total556