*Excludes Observations that spanned multiple years

Pre 197014
19700
19710
19720
19730
19742
19750
19760
19770
19780
19790
19802
19810
19820
19832
19841
19853
19867
19873
19881
19893
19903
19912
19924
19932
19945
19952
19962
19970
19983
19991
20001
20012
20020
20036
20049
20058
20066
20079
20082
20096
20106
20118
20124
20137
20143
20154
20164
20174
201810
20196
20203
20217
20226
20231
20240
Total184