A data frame with 75 observations on the following 12 variables.
	- y1
- 
	freedom of the press, 1960 
- y2
- 
	freedom of political opposition, 1960 
- y3
- 
	fairness of elections, 1960 
- y4
- 
	effectivness of elected legislature, 1960 
- y5
- 
	freedom of the press, 1965 
- y6
- 
	freedom of political opposition, 1965 
- y7
- 
	fairness of elections, 1965 
- y8
- 
	effectivness of elected legislature, 1965 
- x1
- 
	GNP per capita, 1960 
- x2
- 
	energy consumption per capita, 1960 
- x3
- 
	percentage of labor force in industry, 1960