*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19932
19943
199510
19963
19971
19989
19999
20002
20012
20021
20031
20042
20054
20062
20074
20083
200914
201080
20112
20129
2013107
201442
201554
201682
20170
Total450