2000 2001 2002 2003 2004 2005 2006 2007

Deutsche Post [10–15] % [10–15] % [10–15] % [15–20] % [15–20] % [15–20] % [20–25] % [20–25] %

Deutsche Bahn [0–5] % [0–5] % [0–5] % [0–5] % [0–5] % [5–10] % [5–10] % [5–10] %

Kühne + Nagel [0–5] % [0–5] % [0–5] % [0–5] % [0–5] % [0–5] % [5–10] % [5–10] %

Panalpina [10–15] % [10–15] % [10–15] % [10–15] % [15–20] % [15–20] % [15–20] % [15–20] %