market demand:software eng, maths,or physics?

I need to decide what to study when I apply for college.
I'm interested in all three, equally, as hard it is to believe.

What should I do? Should I take a year off to work and think about which of the three I really want to learn and work after graduating?
Or go for the one which will be highest in demand in 4 years (major)? Which will be?

Please help me, counsellor /pro.

Take a year off; do not pick something worthless like maths or physics.