*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19865
19871
19880
19890
19904
199111
19928
19935
199410
199530
19967
199718
19981
199941
20000
20011
20021
20032
20040
20054
20061
20071
20081
20090
201049
201132
20129
20136
20145
20151
20162
20170
20180
Total259