*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19832
19840
19852
19860
19871
19884
19890
19903
199147
199229
199318
19945
19954
199623
19976
19982
19992
20005
20014
20023
20032
20040
20054
20060
20071
20081
20096
20106
20118
20123
20139
201413
20158
20169
201731
201817
20193
20201
20213
202211
20232
20240
Total299