*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19863
19870
19880
19890
19900
19910
19920
19932
19941
19950
19960
19970
19980
19991
20000
20011
20020
20033
20045
20051
20063
20072
20083
20090
20100
20110
20121
201310
20140
20150
20160
201716
201821
20193
20201
20210
20224
20233
20243
Total89