Oh great. Didn't realise repeat missions worked for Passenger ships too (I m guessing I tried, but may have messed up). That helps, thanks!
Year is now 2141 (up from 2128), colonies have thankfully grown up and economy is much better now. Strategic resource (7 resources - Steel, Lead, Carbon Fibre, Polymer, Silicon, Hydrogen, Caslon) still continues. Incidentally, I couldn't figure out what role these play (Do they effect pop growth, development or any other aspect of economy - whether while planet is growing, or once it has reached maximum population)