In 1955, the number of people who listen to xwz radio station showed a record high, climbing back to 25[the starting point the same as 1940] in 1960. The figures rose partially and remained constant during a decade

In 1955, the number of people who listen to XWZ radio station showed a record high, climbing back to 25[the starting point the same as 1940] in 1960. The figures rose partially and remained constant during a decade. While In 1980 , The line decreased dramatically , reaching its fluctuation among 20 years .The graph remained steady from 2000 till 2015 , will go up its peak by 2030 and there will be no change.