Question: What year was the coach of the 64th season 49ers inducted into the hall of fame?

Context articles: Charlie Krueger
2011 San Francisco 49ers season
2013 San Francisco 49ers season
2009 San Francisco 49ers season
List of San Francisco 49ers head coaches
2016 San Francisco 49ers season
1971 San Francisco 49ers season
1971 Los Angeles Rams season
1972 San Francisco 49ers season
Mike Singletary

Charles Andrew Krueger (born January 28, 1937) is a former American football defensive tackle.
 He played his whole fifteen-season career in the NFL for the San Francisco 49ers.
 Previously he was an All-American at Texas A&M University and was inducted into the College Football Hall of Fame in 1982.
 With the 49ers, Krueger wore number 70 and his number was retired by the 49ers.
 He was one of the last linemen in the NFL to wear a two-bar "quarterback" facemask.
 Charlie's brother Rolf was also an NFL player with the St. Louis Cardinals and the 49ers, in which Charlie played in the last two seasons with Rolf.
The 2011 San Francisco 49ers season was the franchise's 66th season overall, and 62nd in the National Football League (NFL).
 It is the first season under head coach Jim Harbaugh and general manager Trent Baalke.
 The 49ers rebounded from their disappointing 2010 season to end their streak of eight consecutive non-winning seasons.
 After defeating the St. Louis Rams in week 13 and attaining a 10–2 record, the team clinched the NFC West and made their first playoff appearance since 2002 (under head coach Steve Mariucci).
 The 49ers ended the regular season with a 13–3 record, their best since 1997 and earned a bye in the first round of the playoffs.
 In the Divisional Playoffs they defeated the New Orleans Saints 36–32 and were in the NFC Championship for the first time since 1997 where they lost against the New York Giants 20–17 in overtime, coming just short of returning to the Super Bowl for the first time since 1994.
 Despite their most successful season in years, the 49ers were 31st in the league in third down conversion percentage in the regular season (29.1) and were 17.9 percent in the playoffs.
The San Francisco 49ers season was the franchise's 64th season in the National Football League, the 68th overall and the third under the head coach/general manager tandem of Jim Harbaugh and Trent Baalke.
 This was the 49ers' final season playing their home games at Candlestick Park before moving into Levi's Stadium for the 2014 season.
The 2009 San Francisco 49ers season was the franchise's 64th season, 60th in the National Football League, and the first full year with Mike Singletary as head coach after being named interim head coach in 2008.
 It is the seventh year in which the 49ers have their seventh offensive coordinator.
 They were looking to improve upon their 7–9 record from 2008 with the 10th overall pick in the 2009 NFL Draft,
There have been 19 head coaches in the history of the San Francisco 49ers professional football franchise.
 The San Francisco 49ers franchise was formed in 1946 as a charter member of the All-America Football Conference (AAFC) before joining the National Football League (NFL) in 1950 after the AAFC merger with the NFL.
 Buck Shaw became the first head coach of the 49ers in 1946, serving for nine seasons—four in the AAFC and five in the NFL.
 He coached a number of future College and Pro Football Hall of Famers, such as Frankie Albert, Joe Perry, Leo Nomellini, Y. A. Tittle, Bob St. Clair and Hugh McElhenny.
 In terms of tenure, Bill Walsh has coached more games (152) and more complete seasons (10) than any other head coach in 49ers franchise history.
 He led the 49ers to playoff appearances in seven seasons, three of which led to the Super Bowl championship, in 1981, 1984 and 1988.
 Jerry Rice, Joe Montana, Charles Haley, Ronnie Lott, Johnny Davis, Roger Craig, Fred Dean and Steve Young are among the players Walsh has coached in his career.
The 2016 San Francisco 49ers season was the franchise's 67th season in the National Football League, the 71st overall, the third playing its home games at Levi's Stadium, and the only season under head coach Chip Kelly.
 The season saw the 49ers attempting to rebound from their 5–11 record the previous year.
 However, this season would prove to be even worse than the previous, as the 49ers finished 2–14, with their only wins coming against their arch-rival Los Angeles Rams.
 The 49ers' record is their worst since 2004, when they also finished 2–14 (both wins were against the Arizona Cardinals).
 The 49ers' 1–7 home record tied the worst home record in franchise history (not including the strike shortened 1982 season).
 As a result, the 49ers fired head coach Chip Kelly and general manager Trent Baalke.
The 1971 San Francisco 49ers season was the team's 22nd year with the National Football League.
 The 49ers appeared in the NFC Championship Game for the second consecutive year.
 The team moved into a new home, Candlestick Park.
 After winning two of their first three games on the road the 49ers lost their first game at Candlestick Park to the Los Angeles Rams 20-13.
 The 49ers would rebound and win the NFC West for the second year in a row by posting a 9-5 record.
 However, for the second year in a row the 49ers season ended in disappointment with a 14-3 loss in the NFC Championship Game to the Cowboys in Dallas.
The 1971 Los Angeles Rams season was the team's 34th year with the National Football League and the 26th season in Los Angeles.
 The team looked to improve on its 9-4-1 record from 1970.
 The Rams would finish one game below their goal, as they finished 8-5-1 and finished 2nd in the NFC West behind the San Francisco 49ers.
 The Rams would start out strong, as they started 4-1-1 in their first 6 games before splitting their final 8 games.
 Despite sweeping the 49ers on the season (the 49ers would win the NFC West at 9-5), a crucial tie against the Atlanta Falcons in week 2 proved to doom the Rams, because had they beaten Atlanta, they would've clinched the NFC West by virtue of their sweep over the 49ers.
The 1972 San Francisco 49ers season was the team's 23rd year with the National Football League.
 The 49ers appeared in the playoffs for the third consecutive year.
 After an early season injury to Quarterback John Brodie, Steve Spurrier stepped in and turned things around with brilliant performances to get the 49ers back in the playoff picture by going 5-2-1 over eight games.
 In the last game of the season Brodie returned in the 4th Quarter and threw two Touchdown passes to lead the 49ers to a 20-17 victory over the Minnesota Vikings, as the 49ers won the third straight Division Title with an 8-5-1 record.
 In the Divisional Playoffs at Candlestick the 49ers looked poised for a return to the NFC Championship leading the Dallas Cowboys 28-13 entering the 4th Quarter.
 However, the Cowboys would score 17 points to break the hearts of San Francisco again.
 This would mark the last playoff appearance for the 49ers until 1981.
Michael Singletary (born October 9, 1958) is an American football coach and former professional football player.
 After playing college football for Baylor University, Singletary was drafted by the Chicago Bears in the 2nd round of the 1981 NFL Draft and was known as "The Heart of the Defense" for the Chicago Bears' Monsters of the Midway in the mid-1980s.
 He was inducted into the Pro Football Hall of Fame in 1998.
 Singletary later pursued a career as a coach, first as a linebackers coach for the Baltimore Ravens, then as the linebackers coach for the San Francisco 49ers.
 In 2008, the 49ers promoted Singletary to the head coaching position after previous head coach Mike Nolan was fired during the season, and he remained in that position until he was fired after the 49ers were eliminated from the playoffs with one game remaining in the 2010 season.