[Koracan]

...projection on Greek TV suggests 61% voted 'No'...
The projected turnout in Sunday's referendum was about 60%

Since most people probably did not understand the real Deals to be made, they just voted for: Do I want to be called/identified as Greek or European,
with the 2001 new currency Euro as a major identification of being European.
40 % did not vote and are not interested.
That means about 3 million (61%) voted No, that makes it 33 % of the Voting age population.
One could argue, Greece made great strides towards a European participation.after introduction of the Euro fairly recently in 2001.

[BigEdLB]

National results
With 100% of votes reported
Yes / Accepted 38.69%
Votes 2,245,537
No / Not accepted 61.31%
Votes 3,558,450
Turnout 62.5