1995

6,238,567

1996

6,567,226

1997

7,103,531

1998

7,618,676

1999

8,401,648

2000

8,573,602

2001

8,121,629

2002

8,438,982

2003

8,331,316

2004

8,508,360

2005

8,447,977

2006

8,267,931

2007

8,049,136

2008

7,311,654

2009

5,741,210

2010

6,582,801