Expansion speed of the universe is 70.761 kmps per megaparsec

2012 "The most precise measurement ever made of the speed of the universe's expansion is in, thanks to NASA's Spitzer Space Telescope, and it's a doozy. Space itself is pulling apart at the seams, expanding at a rate of 74.3 plus or minus 2.1 kilometers (46.2 plus or minus 1.3 miles) per second per megaparsec (a megaparsec is roughly 3 million light-years)."

2016 "A new series of papers published in the Monthly Notices of the Royal Astronomical Society finds the value to be 71.2 km/s/Mpc, which supports a change over time of the Hubble constant. The observation was performed by an international group of astronomers that used the Hubble Space Telescope to look at how massive galaxies bend space-time, acting as gravitational lenses."

They are getting closer! The correct answer is more like 70.761 km/s/Mpc

I calculated this number with the following assumptions:

A mega parsec = 3,262,000 light years = .003262 BLY
Age of the universe  = 13.82 BLY
Speed of light = 299,792.458 km/s

This is based on what I believe the universe is, why it is expanding and why the speed of light is a constant.  I am not a theoretical physicist... or a physicist... or an astronomer... or astrologist ;) ... Just someone who knows nothing about this stuff but likes to think  about it a lot anyway.