Table: british rail railbuses
[['number range', 'builder', 'introduced', 'no built', 'region', 'withdrawn'], ['79958 - 59', 'bristol / eastern coach works', '1958', '2', 'scotland', '1966'], ['79960 - 64', 'wmd donauwãrth', '1958', '5', 'eastern region / london midland', '1967'], ['79965 - 69', 'd wickham & co', '1958', '5', 'scotland', '1966'], ['79970 - 74', 'park royal vehicles', '1958', '5', 'london midland / scotland', '1968'], ['79975 - 79', 'ac cars', '1958', '5', 'scotland / western region', '1968'], ['999507 elliot', 'wickham', '1958', '1', 'departmental', '1997'], ['998900 - 998901', 'drewry', '1950', '2', 'departmental', '1990']]
Statement: all but 1 railbus was Introduced in 1958
Statement: the Wickham Built Railbuses lasted the longest being Withdrawn in 1997
Statement: both the D Wickham & Co and the Bristol / Eastern Coach Works Railbuses only lasted until 1966
Statement: Wickham produced the least amount of Railbuses
Statement: Scotland had a total of 17 different Railbuses operating