I'll give you 15 years worth of podiums:
(bold = proven "non-natural" and/or links to thereof)
2010
1 Alberto Contador Velasco (Spa) Astana
2 Andy Schleck (Lux) Team Saxo Bank
3 Denis Menchov (Rus) Rabobank
2009
1 Alberto Contador Velasco (Spa) Astana
2 Andy Schleck (Lux) Team Saxo Bank
3 Lance Armstrong (USA) Astana
2008
1 Carlos Sastre Candil (Spa) Team CSC - Saxo Bank
2 Cadel Evans (Aus) Silence - Lotto
3 *Denis Menchov (Rus) Rabobank
2007
1 Alberto Contador Velasco (Spa) Discovery Channel
2 Cadel Evans (Aus) Predictor - Lotto
3 Levi Leipheimer (USA) Discovery Channel
2006
1 *Oscar Pereiro (Spa) Caisse d'Epargne-Illes Balears
2 Andreas Klöden (Ger) T-Mobile
3 Carlos Sastre (Spa) Team CSC
2005
1 Lance Armstrong (USA)
2 Ivan Basso (Ita)
3 Jan Ullrich (Ger)
2004
1 Lance Armstrong (USA)
2 Andreas Klöden (Ger)
3 Ivan Basso (Ita)
2003
1 Lance Armstrong (USA)
2 Jan Ullrich (Ger)
3 Alexandre Vinokourov (Kaz)
2002
1 Lance Armstrong (USA)
2 Joseba Beloki (Spa)
3 Raimondas Rumsas (Ltu)
2001
1 Lance Armstrong (USA)
2 Jan Ullrich (Ger)
3 Joseba Beloki (Spa)
2000
1 Lance Armstrong (USA)
2 Jan Ullrich (Ger)
3 Joseba Beloki (Spa)
1999
1 Lance Armstrong (USA)
2 Alex Zulle (Swi)
3 Fernando Escartin (Spa)
1998
1 Marco Pantani (Ita)
2 Jan Ullrich (Ger)
3 Bobby Julich (USA)
1997
1 Jan Ullrich (Ger)
2 Richard Virenque (Fra)
3 Marco Pantani (Ita)
1996
1 Bjarne Riis (Den)
2 Jan Ullrich (Ger)
3 Richard Virenque (Fra)
1995
1 Miguel Indurain (Spa)
2 Alex Zülle (Swi)
3 Bjarne Riis (Den)
(bold = proven "non-natural" and/or links to thereof)
2010
1 Alberto Contador Velasco (Spa) Astana
2 Andy Schleck (Lux) Team Saxo Bank
3 Denis Menchov (Rus) Rabobank
2009
1 Alberto Contador Velasco (Spa) Astana
2 Andy Schleck (Lux) Team Saxo Bank
3 Lance Armstrong (USA) Astana
2008
1 Carlos Sastre Candil (Spa) Team CSC - Saxo Bank
2 Cadel Evans (Aus) Silence - Lotto
3 *Denis Menchov (Rus) Rabobank
2007
1 Alberto Contador Velasco (Spa) Discovery Channel
2 Cadel Evans (Aus) Predictor - Lotto
3 Levi Leipheimer (USA) Discovery Channel
2006
1 *Oscar Pereiro (Spa) Caisse d'Epargne-Illes Balears
2 Andreas Klöden (Ger) T-Mobile
3 Carlos Sastre (Spa) Team CSC
2005
1 Lance Armstrong (USA)
2 Ivan Basso (Ita)
3 Jan Ullrich (Ger)
2004
1 Lance Armstrong (USA)
2 Andreas Klöden (Ger)
3 Ivan Basso (Ita)
2003
1 Lance Armstrong (USA)
2 Jan Ullrich (Ger)
3 Alexandre Vinokourov (Kaz)
2002
1 Lance Armstrong (USA)
2 Joseba Beloki (Spa)
3 Raimondas Rumsas (Ltu)
2001
1 Lance Armstrong (USA)
2 Jan Ullrich (Ger)
3 Joseba Beloki (Spa)
2000
1 Lance Armstrong (USA)
2 Jan Ullrich (Ger)
3 Joseba Beloki (Spa)
1999
1 Lance Armstrong (USA)
2 Alex Zulle (Swi)
3 Fernando Escartin (Spa)
1998
1 Marco Pantani (Ita)
2 Jan Ullrich (Ger)
3 Bobby Julich (USA)
1997
1 Jan Ullrich (Ger)
2 Richard Virenque (Fra)
3 Marco Pantani (Ita)
1996
1 Bjarne Riis (Den)
2 Jan Ullrich (Ger)
3 Richard Virenque (Fra)
1995
1 Miguel Indurain (Spa)
2 Alex Zülle (Swi)
3 Bjarne Riis (Den)