Translate the following English sentence to French:
"Its peripheral location, something which has already been stressed here from other areas, and its small family farm units having to compete in a wider market, coupled with the high value of sterling, has meant that it has lost 80% of its income in less than three years."
En raison de sa situation périphérique, ce que l'on a déjà souligné ici, de la concurrence accrue à laquelle sont soumises ses petites exploitations familiales et de l'appréciation de la livre sterling, elle a perdu 80 % de ses revenus en moins de trois ans.