*Excludes Observations that spanned multiple years

Pre 197022
19701
19712
19720
19730
19741
19751
19760
19770
19781
19790
19800
19810
19820
19830
19840
198510
19863
19874
19883
19894
199020
19915
199211
19931
19940
19951
19962
19970
19980
19990
20000
20012
20021
20031
20041
20050
20061
20071
20085
20093
20100
20112
20120
20132
20141
20151
20164
20170
20180
Total117