*Excludes Observations that spanned multiple years

Pre 197012
19700
19710
19720
19732
19740
19750
19760
19770
19781
19790
19800
19810
19820
19831
19840
19850
19861
19870
19880
19890
19900
19911
19921
19931
19940
19951
19961
19970
19981
19992
20000
20010
20022
20031
20043
20053
200613
20079
20084
200928
20109
201112
201225
201317
201417
201524
201629
201723
201837
201996
20200
20210
Total377