Looking at economic growth between 1967 and 1994 when Palestine was fully occupied by Israel gives a much brighter picture than between 1994 and 2000 when Arafat assumed full civil control and partial police and military control of the territories. Both those pictures are much brighter than the one painted from 2000 onward when violence against Isreal was in full swing and due to sanctions, an international community that was not willing to finance a Palestian war against Israel, and the fact that anyone in their right mind started divesting themselves of assets which were in a war zone. These factors have produced a shrinking Palestinian economy and let's not kid ourselves the war has also hit Israel's economy as well. I don't know off the top of my head what the "real" statistics are for the years of occupation (1967 - 1994) but I do know the statistics used here are extremely adversely influenced by the decision to put a corrupt leader like Arafat in power and to go to war.
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from the article: Unmoved by the humanitarian crisis