  An extraordinary number of Hubble constant measurements challenges physicists
with selection of the best numerical value. The standard U.S. Nuclear Data
Program (USNDP) codes and procedures have been applied to resolve this issue.
The nuclear data approach has produced the most probable or recommended Hubble
constant value of 66.2(77) (km/sec)/Mpc. This recommended value is based on the
last 25 years of experimental research and includes contributions from
different types of measurements. The present result implies
(14.78$\pm$1.72)$\times$10$^{9}$ years as a rough estimate for the age of the
Universe. The complete list of recommended results is given and possible
implications are discussed.
