Amazon projects it's on track to deliver nearly 90% of its own US packages

An Amazon delivery van. Bloomberg/Getty Images Amazon forecasts its own delivery network will handle nearly 90% of its US packages by 2029. Almost all projected package growth would flow through Amazon's own delivery network. Amazon projects that UPS and USPS will handle a shrinking share of its packages. Amazon's own delivery network is handling a rapidly growing share of its US packages, with a recent internal forecast projecting that figure could approach nine out of every 10 packages by…