Your Wikipedia article link doesn't directly address this. It points to several other documents though:
A 2000 ZDNet article by Duncan Campbell:
http://www.zdnet.com/article/echelon-world-under-watch-an-in...
"Under a secret agreement signed in 1947, called UKUSA, the English-speaking countries agreed to share responsibility for overseeing surveillance in different parts of the world."
That doesn't tell much. But this does:
"On 6 September 1960, two NSA defectors held a press conference and revealed the worldwide scope of NSA's activities:"
"'We know from working at NSA [that] the United States reads the secret communications of more than forty nations, including its own allies... Both enciphered and plain text communications are monitored from almost every nation in the world, including the nations on whose soil the intercept bases are located.'"
It also discusses the Church Commission hearings (1975).
I'm not sure how I'd classify this, but I see general awareness as being vastly greater. And as someone who's been paying attention to this story for a long time (15+ years), it's news to me.