Over 60% !! And even more would be if they could afford meat.
And 40% drink alcohol
    Only 28% of men and 38% of women are vegeterians , the rest
eat fish but call themselves veggies . Only 21% smoke

http://www.hindu.com/2006/08/14/stories/2006081403771200.htm
The findings show that only 31 per cent of Indians are vegetarians.
The figure is 21 per cent for families (with all vegetarian members).
Another nine per cent of the population is `eggetarian,' or
vegetarians who eat eggs.

Vegetarianism has a predictable pattern: women are more likely to be
vegetarian than men and so are those above the age of 55. But there is
no broad correspondence between age and vegetarianism. Among the
young, the figure is only slightly below the national average.

The findings show that vegetarianism is a function of inherited
cultural practice rather than individual belief. Religion and
community matter: as many as 55 per cent of Brahmins are vegetarians.
The corresponding figure for Adivasis is 12 per cent. Hindus who
worship every day are more likely to be vegetarian, but the majority
of all Hindus are non-vegetarian. Interestingly, eight per cent of
Christians are also vegetarians.

The survey shows that regional location matters more than caste or
community. As expected, the lowest proportion of vegetarian families
are in coastal States such as Kerala (two per cent), Tamil Nadu (eight
per cent), Andhra Pradesh (four per cent), Orissa (eight per cent) and
Bengal (three per cent). Most land-locked States, especially in the
west and north, are places with the highest proportion of vegetarian
families: Rajasthan (63 per cent), Haryana (62 per cent), Punjab (48
per cent), Uttar Pradesh (33 per cent), Madhya Pradesh (35 per cent)
and Gujarat (45 per cent).

The survey also throws light on some changing food habits due to the
influence of `modernity.' Tea or coffee is consumed by 77 per cent of
the people every day. Cold drinks are yet to catch up: only four per
cent consume it every day. But this figure goes up to 30 per cent if
irregular consumers are included. The consumption is markedly higher
among the young. A little less than half of urban India and a little
less than a quarter of rural India consume cold drinks.

Smoking is widespread. Twenty one per cent smoke cigarettes or bidis
every day. But there is no evidence of the rise of smoking among the
youth.

Similarly, there is no evidence that more youth are drinking. Thirteen
per cent drink regularly or sometimes. The highest incidence is among
the middle-aged (between 36 and 45 years) and among communities where
there are no taboos on drinking.

But these findings could be an underestimation as nearly two-thirds of
those polled believe that drinking has increased in their locality
over the last decade. This is true even in Gujarat,
The Hindu -CNN-IBN survey also provides evidence on the nutritional
quality of food and the extent of food deprivation. A majority report
that the quality of their food intake is better than what it was 10
years ago and better than what their parents ate. The same is true of
the intake of nutritional ingredients such as milk for children,