Question: How find one curve fitting exponential equation for the points below?

How find one curve fitting exponential  equation (or any other curve fitting) for the points:

X := [-0.012, -0.010, -0.004, -0.002, -0.001, -0.0001, 0.0001, 0.001, 0.002, 0.004, 0.010, 0.012];
Y := [-0.695, -0.7, -0.74, -0.825, -0.95, -1.0, 1.0, 0.95, 0.825, 0.74, 0.7, 0.695];
 

I tried, but it wasn't. Look:

X := [-0.012, -0.010, -0.004, -0.002, -0.001, -0.0001, 0.0001, 0.001, 0.002, 0.004, 0.010, 0.012];
Y := [-0.695, -0.7, -0.74, -0.825, -0.95, -1.0, 1.0, 0.95, 0.825, 0.74, 0.7, 0.695];

f := c + exp(-b*x);
                       f := c + exp(-b x)

Statistics*[NonlinearFit](f, X, Y, x);

Statistics [NonlinearFit(c + exp(-b x), [-0.012, -0.010, -0.004,  -0.002, -0.001, -0.0001, 0.0001, 0.001, 0.002, 0.004, 0.010, 

  0.012], [-0.695, -0.7, -0.74, -0.825, -0.95, -1.0, 1.0, 0.95, 0.825, 0.74, 0.7, 0.695], x)]

The Maple not find the curve.

I should get a curve like that (exemple):