From Wikipedia:
"New In Chess observed in its 2000 Yearbook that of the 731,740 games in its database, White scored 54.8% overall; with the two most popular opening moves, White scored 54.1% in 349,855 games beginning 1.e4, and 56.1% in 296,200 games beginning 1.d4. The main reason that 1.e4 was less effective than 1.d4 was the Sicilian Defence (1.e4 c5), which gave White only a 52.3% score in 145,996 games."
So, statistically 1.d4 scored a bit better than 1.e4, at least in the matches from New in Chess' database. But, as all statistical data, it's not applicable to particular cases. Otherwise said, you shouldn't prefer 1.d4 to 1.e4 only because those statistics said it scores better on average. There have been games won with 1.e4 c5, and you may be amongst those that win with that variation more than with 1.d4.
I also prefer 1.d4 though
What math?
please let me know if u can....