Question: Kwak Do-won starred in the highest grossing film of which year? 

Context articles: Good Doctor (TV series)
Steel Rain
An Ethics Lesson
The Mayor (2017 film)
Border (1997 film)
A Company Man
The Attorney
The Three Treasures
Kwak Do-won
Phantom (TV series)

Good Doctor () is a 2013 South Korean medical drama television series starring Joo Won, Moon Chae-won, Joo Sang-wook, Kim Min-seo, Chun Ho-jin, Kwak Do-won and Ko Chang-seok.
 It aired on KBS2 from August 5 to October 8, 2013, on Mondays and Tuesdays at 21:55 for 20 episodes.
Steel Rain is an upcoming South Korean action drama film directed by Yang Woo-suk, based on his webtoon of the same name.
 The film stars Jung Woo-sung and Kwak Do-won.
An Ethics Lesson (; lit.
 "The Ethics of Anger") is a 2013 South Korean film starring Lee Je-hoon, Cho Jin-woong, Kim Tae-hoon, Kwak Do-won and Moon So-ri.
 Written and directed by Park Myoung-rang, the crime thriller centers on four suspicious men involved in a college girl's murder.
The Mayor (, lit.
 "Special Citizen") is a 2017 South Korean political drama film written and directed by Park In-je.
 It stars Choi Min-sik, Kwak Do-won, Shim Eun-kyung, Moon So-ri, Ra Mi-ran, Ryu Hye-young and Ki Hong Lee.
 The film was released in South Korea on April 26, 2017 and in the US and Canada on April 28.
Border is a 1997 Indian war film based on the Battle of Longewala during the Indo-Pakistani War of 1971, produced and directed by J. P. Dutta.
 The film starred an ensemble cast of Sunny Deol, Sunil Shetty, Akshaye Khanna, Jackie Shroff in pivotal roles.
 The film is an adaptation from real life events that happened at the Battle of Longewala during the Indo-Pakistani War of 1971.
 The film was screened retrospective on August 13th 2016 at the "Independence Day Film Festival" jointly presented by the Indian Directorate of Film Festivals and Ministry of Defense, commemorating 70th Indian Independence Day.
 It was the second highest grossing Bollywood film of the year world wide behind "Dil To Pagal Hai" and highest grossing film of the year in india .
A Company Man () is a 2012 South Korean action thriller film starring So Ji-sub, Lee Mi-yeon, Kwak Do-won and Kim Dong-jun.
 It is about a hitman who find himself targeted by his ex-employers after he falls in love with a single mother and quits his job.
The Attorney () is a 2013 South Korean courtroom drama film directed and co-written by Yang Woo-suk, in his directorial debut (Yang was previously a film producer and webtoon author).
 With 11,375,954 tickets sold and a revenue of ₩82.9 billion , "The Attorney" became the 8th best-selling Korean film of all time, and the second highest-grossing Korean film of 2013.
The Three Treasures (日本誕生 , Nippon Tanjō , lit.
 Birth of Japan) is a 1959 Japanese film directed by Hiroshi Inagaki.
 The film is based on the legends "Kojiki" and "Nihon Shoki" and the origins of "Shinto".
 The film was highest grossing film of 1959 for Toho that year and the second highest grossing domestic production in Japan of the year.
Kwak Do-won (born Kwak Byung-kyu on May 17, 1974) is a South Korean actor.
 He is known for his roles in the films "The Yellow Sea" (2010), "" (2012), "The Attorney" (2013) and "The Wailing" (2016).
Phantom () is a 2012 South Korean television series, starring So Ji-sub, Lee Yeon-hee, Um Ki-joon, Kwak Do-won, and Song Ha-yoon.
 The police procedural tackles crimes and clues in the cyber world, weaving a massive, twist-filled mystery of murders, identity switches, corruption and conspiracy.