{"text_format":"dbase-jsonl-2026-09-30","columns":[{"name":"YEAR","type":"character","width":9},{"name":"MILES","type":"number","width":9,"decimals":1}],"n_rows":6,"rows_kept":6,"cut":false,"deleted_skipped":0,"read_ended":"whole","bounds":"16MiB/16384/4096/first_that_fit","version":"dbase_level_three","encoding_class":"enc_absent","reader":"statdb_count/9"}
["1921-1936",0.0]
["1937-1952",33.8]
["1953-1965",26.4]
["1966-1978",18.5]
["1979-1988",5.1]
["1989-2000",25.2]