| 
 YEAR  | 
 % Full-Time  | 
 % Part-Time  | 
 % Total  | 
| 
 1980  | 
 6.7  | 
 6.9  | 
 6.8  | 
| 
 1981  | 
 7.6  | 
 6.4  | 
 7.1  | 
| 
 1982  | 
 7.6  | 
 7.8  | 
 7.7  | 
| 
 1983  | 
 8.5  | 
 9.3  | 
 8.8  | 
| 
 1984  | 
 8.4  | 
 9.0  | 
 8.6  | 
| 
 1985  | 
 8.4  | 
 10.5  | 
 9.2  | 
| 
 1986  | 
 9.0  | 
 9.7  | 
 9.2  | 
| 
 1987  | 
 8.9  | 
 8.9  | 
 8.9  | 
| 
 1988  | 
 8.4  | 
 10.2  | 
 9.0  | 
| 
 1989  | 
 9.1  | 
 10.1  | 
 9.5  | 
| 
 1990  | 
 10.1  | 
 9.9  | 
 10.0  |