I should think that 65 to 70 is too high an estimate for the raw average. It depends upon the difficulty of the paper, I'm probably hideously wrong but I think and average of something between 50 to 60 is more likely.
It wasn't an hard paper like 1993 (average = 46.74), but I really doubt the average would exceed 65.
Here's a list from a book of the raw mark/120, NOTE not the raw average from (1988-1998), listed from highest to lowest:
1988 - 68.85
1998 - 62.65
1996 - 62.08
1997 - 61.69
1995 - 60.58
1994 - 58.57
1989 - 57.53
1991 - 55.03
1990 - 54.78
1992 - 51.70
1993 - 46.74
So during that period '88 to '98, the highest raw average was only 57% (The lowest in '93 was 39%).
I know these are old figures, but I wouldn't have thought the averages would change that significantly. I know that from going through the past papers from '88 to '04 the raw marks I was getting on them were reasonably comparable regardless of the text (with a few exceptions).
I'm only guess, so don't hate me when it turns out I was horribly wrong.