Question: Superleague Greece is ranked 14th in the ranking system that was introduced in what year?

Context paragraphs:
2009–10 Olympiacos F.C. season: The 2009–10 season was Olympiacos' 51st consecutive season in the Superleague Greece.  Olympiacos finished 2nd in the regural season of the Greek SuperLeague and ranked last at the play-off games, resulting in a 5th place at the League,the worst position of team's recent seasons.  Olympiacos also participated in UEFA Champions League 09-10, and managed to qualify to the knock-stage (round of 16).  They lost twice from French side Bordeaux, 3-1 on aggregate.

Healthcare in Greece: Healthcare in Greece consists of a universal health care system provided through national health insurance, and private health care.  According to the 2011 budget, the Greek healthcare system was allocated 6.1 billion euro, or 2.8% of GDP.  In a 2000 report by the World Health Organization, the Greek healthcare system was ranked 14th worldwide in the overall assessment, above other countries such as Germany (25) and the United Kingdom (18), while ranking 11th at level of service.

Superleague Greece Youth Leagues: The Superleague Greece Youth Leagues is a system of youth football leagues that are managed, organised and controlled by the Superleague.  Youth Leagues are the organizational events involving the superleague clubs' infrastructure teams.  It was established in 2002 as a single category, and in 2008 it split into two, until 2013 to three age levels.  Previously known as the "Amateur Championship".

2012–13 Olympiacos F.C. season: The 2012–13 season was Olympiacos' 54th consecutive season in the Superleague Greece.  They competed in the Greek Superleague, Greek Cup, UEFA Champions League and UEFA Europa League.

Superleague Greece: The Superleague Greece (Greek: Ελληνική Σούπερ Λιγκ ) or Souroti Super League for sponsorship reasons, is the highest professional football league in Greece.  It was formed on 16 July 2006 and replaced "Alpha Ethniki" at the top of the Greek football league system.  The league consists of 16 teams and runs from August to May, with teams playing 30 games each.  As of August 2017, Superleague Greece is ranked 14th in the UEFA ranking of leagues, based on performances in European competitions over the last five years.

UEFA coefficient: In European football, the UEFA coefficients are statistics used for ranking and seeding teams in club and international competitions.  Introduced in 1979, the coefficients are calculated by UEFA, who administer football within Europe.

2012–13 Superleague Greece: The 2012–13 Superleague Greece was the 54th season of the highest football league of Greece and the seventh under the name Superleague.  The season started on 25 August 2012 and ended on 2 June 2013 with the last matches of the European playoff round.  Olympiacos were the defending champions, having won their 39th Greek championship in the 2011–12 season.  They successfully defended their crown, finishing 15 points ahead of second-placed PAOK.

2013–14 Superleague Greece: The 2013–14 Superleague Greece is the 78th season of the highest football league of Greece and the eighth under the name Superleague.  The season began on August 17 and ended in May 2014.  Olympiacos are the champions, having won their 41st Greek championship.

2011–12 Superleague Greece: The 2011–12 Superleague Greece was the 53rd season of the highest football league of Greece and the sixth under the name Superleague.  The season began in late August or early September 2011 and ended in May 2012 with the last matches of the European playoff round.  Olympiacos are the defending champions, having won their 38th Greek championship in the 2010–11 season.

2007–08 Olympiacos F.C. season: The 2007–08 season is Olympiacos 49th consecutive season in the Superleague Greece and their 11th consecutive season in the UEFA Champions League.  Manager Takis Lemonis left the club by mutual consent on 11 March 2008 due to the club's lower-than-expected performance of the team in the Superleague, and was replaced by his assistant, José Segura.

Supporting paragraphs: Superleague Greece UEFA coefficient
Answer: 1979