|
Number of |
| Year |
Trips |
| 1987 |
24,092 |
| 1988 |
19,912 |
| 1989 |
24,132 |
| 1990 |
25,830 |
| 1991 |
28,452 |
| 1992 |
27,003 |
| 1993 |
28,170 |
| 1994 |
30,093 |
| 1995 |
31,625 |
| 1996 |
31,240 |
| 1997 |
31,015 |
| 1998 |
29,406 |
| 1999 |
31,801 |
| 2000 |
27,796 |
| 2001 |
27,265 |
| 2002 |
26,076 |
| 2003 |
28,034 |
| 2004 |
30,396 |
| 2005 |
29,438 |
| 2006 |
28,852 |
| 2007 |
27,847 |
| AVERAGE |
28,023 |
| STD. DEV. |
2,828 |
|
