You mean like this? They brag about the 161 successful launches - no mention about the failures. But given the limited number of launches per year the failure rate must be below 1%.
Successful Trident II D5 Missile Flight Test Supports Navy Submarine Certification for Strategic Patrol · Lockheed Martin
"...... The missile was converted into a test configuration using a test missile kit produced by Lockheed Martin that contains range safety devices, tracking systems and flight telemetry instrumentation."........