Question: What were the dates of the international career for the most successful player of FC Lahti?

Context paragraphs:
Jukka Koskinen (footballer): Jukka Koskinen (born 29 November 1972) is a Finnish former footballer who played as a defender.  His clubs included Willem II Tilburg in the Netherlands, Anyang LG Cheetahs of the South Korean K League, Reipas Lahti, MyPa, FC Haka and FC Lahti in Finland.

FC Lahti: FC Lahti is a Finnish football club based in the city of Lahti.  It currently plays in the Finnish Premier League ("Veikkausliiga") after placing first in the Finnish First Division ("Ykkönen") during season 2011.  The homeground of FC Lahti is Lahden Stadion.  FC Lahti is famous of being the local team of the most successful Finnish player, Jari Litmanen.  Litmanen played in FC Lahti two times, 2004 and 2009-2010.  In his youth years and the start of his career, he played in Reipas Lahti.

Toni Järvinen: Toni Järvinen (born 27 January 1981) is a Finnish footballer who last played for Tampere United.  He plays either as a midfielder or a side defender.  Järvinen's junior team was Kuusysi Lahti and he has also played for FC Lahti in the Finnish premier division Veikkausliiga.  As of September 2010 he has played 167 matches and scored 11 goals in the premier division.  On 24 September 2010 he announced his retirement from the game because he never recovered from his injuries.

FC Kuusysi: FC Kuusysi (‘sixty-nine’) is a football club in Lahti, Finland.  Its men’s team is currently playing in the third tier of Finnish football ("Kakkonen") under the name FC Lahti Akatemia, and its women's team is playing in Women's Ykkönen.  The homeground of FC Kuusysi is Lahden kisapuisto.

Pekka Sihvola: Pekka Sihvola (born 22 April 1984) is a Finnish professional footballer currently playing as a forward for HIFK in the Veikkausliiga.  He previously played for FC Honka, FC Hämeenlinna, FC Lahti, Haka and MyPa.

Henri Toivomäki: Henri Toivomäki (born 21 February 1991 in Mäntsälä, Uusimaa) is a Finnish footballer, who plays as a defender for Sarpsborg 08.  He previously played for FC Lahti, Atalanta, FC Hämeenlinna, AFC Ajax and Almere City FC.

Mikko Hauhia: Mikko Hauhia (born 3 September 1984 in Lahti) is a Finnish footballer who plays for FC Lahti in Veikkausliiga.

Lahti Stadium: Lahti Stadium (Finnish: "Lahden stadion" ) is a multi-use stadium in Lahti, Finland.  In Winter the stadium is used in cross-country skiing and biathlon.  In summer it is currently used mostly for football matches and is the home stadium of FC Lahti.  The stadium holds 14,500 and was built in 1981.

Lahden kisapuisto: The Lahden kisapuisto is a multi-use stadium in Lahti, Finland.  It is used mostly for football and hosts the home matches of FC Lahti.  The stadium holds 4,000 people and is all-seater.  It also hosted some football matches during the 1952 Summer Olympics.

Jari Litmanen: Jari Olavi Litmanen (   ; born 20 February 1971) is a Finnish former footballer.  He was the first-choice captain of the Finland national team between 1996 and 2008 in an international career that ran from 1989 to 2010.

Supporting paragraphs: FC Lahti Jari Litmanen
Answer: 1989 to 2010