what is the difference in the amount of home games won versus home games lost for werder bremen?
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col : season | competition | round | club | home | away | aggregate row 1 : 2003 | uefa intertoto cup | r1 | wit georgia | 1-0 | 1-2 | 2-2 row 2 :  |  | r2 | fk pobeda | 2-1 | 1-1 | 3-2 row 3 :  |  | r3 | tobol kostanay | 3-0 | 1-0 | 4-0 row 4 :  |  | semifinals | werder bremen | 4-0 | 1-1 | 5-1 row 5 :  |  | finals | fc schalke 04 | 0-2 | 0-0 | 0-2 row 6 : 2004/05 | uefa cup | q2 | zenit st. petersburg | 3-1 | 0-2 | 3-3 row 7 : 2005/06 | uefa cup | q2 | zenit st. petersburg | 2-2 | 1-1 | 3-3 row 8 : 2006/07 | uefa cup | 1 | livorno | 0-1 | 0-2 | 0-3
what is the difference in the amount of home games won versus home games lost for werder bremen?
Season Competition Round Club Home Away Aggregate
2003 UEFA Intertoto Cup R1 WIT Georgia 1-0 1-2 2-2
R2 FK Pobeda 2-1 1-1 3-2
R3 Tobol Kostanay 3-0 1-0 4-0
Semifinals Werder Bremen 4-0 1-1 5-1
Finals FC Schalke 04 0-2 0-0 0-2
2004/05 UEFA Cup Q2 Zenit St. Petersburg 3-1 0-2 3-3
2005/06 UEFA Cup Q2 Zenit St. Petersburg 2-2 1-1 3-3
2006/07 UEFA Cup 1 Livorno 0-1 0-2 0-3
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