  We have found a mechanism which regulates the dark energy in our universe.
With an emergent conformal symmetry, the dark energy density is regulated to
the order of a conformal anomaly parameter in the conformally coupled gravity.
In the late time cosmological evolution, we have obtained a set of exact
cosmological equations which deviate from the Friedmann equations
significantly. Based on the recent observational cosmic expansion data, it is
shown that the dark energy density is about 1/4 of the matter density at
present, which is quite smaller than determined by General Relativity. The jerk
parameter at present is also determined as a definite value 0.47.
