<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.ni njia ya kawaida zaidi inayotumiwa na wafanyakazi wanaojitegemea kutoka zaidi ya nchi mia mbili tangu mwaka 2002.  <response>: it also represents an increase in the average length of ownership of more than 2 years for all vehicles since 2006. 