In a survey conducted in November 2002 of 1,400 international business travelers concerning in-flight service over the past few years, the following information was obtained.

Comments on Quality of Service	Respondents
Has remained the same from two years ago.	630
Has diminished over that time frame.	413
Has improved over that time frame.	329
Weren't sure.	28

If a person in the survey is chosen at random, what is the probability that he or she has rated the in-flight service as remaining the same or improved over the time frame in question?