| December 1999 |
3,299,000 |
| November 1999 |
3,274,800 |
| October 1999 |
3,298,300 |
| September 1999 |
3,353,400 |
| August 1999 |
3,407,000 |
| July 1999 |
3,407,800 |
| June 1999 |
3,452,400 |
| May 1999 |
3,481,100 |
| April 1999 |
3,480,000 |
| March 1999 |
3,457,700 |
| February 1999 |
3,446,300 |
| January 1999 |
3,476,700 |
|
