Best science fiction movie of the year:
1975: Rollerball
1976: Logan's Run
1977: Close Encounters of the Third Kind
1978: Superman
1979: Alien
1980: The Empire Strikes Back
1981: Scanners
1982: Blade Runner
1983: Born in Flames
1984: The Terminator
1985: Back to the Future
1986: Aliens
1987: Robocop
1988: Akira
1989: The Abyss
1990: Total Recall
1991: Terminator 2: Judgment Day
1992:
Sneakers Alien 3
1993: Jurassic Park
1994: Stargate
1995: 12 Monkeys
1996: Star Trek: First Contact
1997:
Contact Men in Black
1998: Dark City
1999: The Matrix
2000: X-Men
2001: A.I.: Artificial Intelligence
2002: Minority Report
2003: X2: X-Men United
2004: Eternal Sunshine of the Spotless Mind
2005: Serenity
2006: Children of Men
2007:
The Man from Earth Sunshine
2008: Wall-E
2009: Moon
2010: Inception
2011: Source Code
2012:
John Carter The Avengers
2013: Her
2014 so far: X-Men: Days of Future Past
4 years later, I'd like to update this. Changed my mind about a few, got it going back to 1950 now. (The 1940s were just a dry spot for sci/fi). Honorable Mentions listed below each year.
1950: Destination Moon
1951: The Day the Earth Stood Still
Thing from Another World, Man in the White Suit, When Worlds Collide
1952: Red Planet Mars
1953: It Came From Outer Space
War of the Worlds, Beast from 20000 Fathoms
1954: Godzilla
20000 Leagues Under the Sea, Creature from the Black Lagoon
1955: This Island Earth
Quatermass Xperiment
1956: Forbidden Planet
Invasion of the Body Snatchers, 1984
1957: The Incredible Shrinking Man
Curse of Frankenstein, Quatermass 2
1958: The Fly
1959: Journey to the Center of the Earth
1960: The Time Machine
Village of the Damned
1961: Voyage to the Bottom of the Sea
1962: La Jetee
Dr. No, Manchurian Candidate
1963: X: The Man with the X-ray Eyes
1964: The Last Man on Earth
Fail-Safe, Dr. Strangelove
1965: The War Game
Alphaville, Planet of the Vampires, 10th Victim
1966: Fahrenheit 451
Fantastic Voyage, Face of Another, Seconds
1967: Quatermass and the Pit
1968: 2001: A Space Odyssey
Night of the Living Dead, Planet of the Apes, Je T'aime Je T'aime
1969: Frankenstein Must be Destroyed
Doppelganger, Illustrated Man
1970: Colossus: The Forbin Project
1971: A Clockwork Orange
Andromeda Strain, Omega Man
1972: Solaris
Slaugherhouse-Five, Eolomea
1973: World on a Wire
Soylent Green, Fantastic Planet
1974: Zardoz
Young Frankenstein
1975: Rollerball
Death Race 2000, Escape to Witch Mountain
1976: Logan's Run
Man Who Fell to Earth, Futureworld
1977: Close Encounters of the Third Kind
Star Wars
1978: Invasion of the Body Snatchers
Dawn of the Dead, Superman
1979: Alien
Stalker, Star Trek
1980: Altered States
Empire Strikes Back, Superman II
1981: Scanners
Escape from New York, Mad Max 2
1982: Blade Runner
The Thing, E.T., All Summer in a Day, Star Trek II
1983: Brainstorm
Videodrome, Born in Flames
1984: Terminator
Nausicaa of the Valley of the Wind, Brother from Another Planet
1985: Brazil
Back to the Future, Enemy Mine
1986: Castle in the Sky
Alens, Transformers
1987: Robocop
Running Man, Predator
1988: Akira
They Live, Alien Nation
1989: The Abyss
1990: Total Recall
Teenage Mutant Ninja Turtles, Hunt for Red October
1991: Terminator 2: Judgment Day
Delicattessen, Star Trek VI
1992: Alien3
Sneakers
1993: Jurassic Park
1994: Stargate
1995: Strange Days
Ghost in the Shell, Twelve Monkeys,
1996: Star Trek First Contact
Arrival, Independence Day
1997: Contact
Gattaca, Open Your Eyes, Fifth Element
1998: Dark City
Truman Show
1999: The Matrix
eXistenZ, Galaxy Quest, Iron Giant, Thirteenth Floor
2000: X-Men
Memento, Battle Royale, The Cell
2001: A.I. Artificial Intelligence
Donnie Darko, Cowboy Bebop
2002: Minority Report
Spider-Man, Solaris
2003: X2: X-Men United
Robot Stories, Code 46, Hulk
2004: Eternal Sunshine of the Spotless Mind
Primer, Spider-Man 2, Butterfly Effect
2005: Serenity
2006: Children of Men
A Scanner Darkly, Paprika, Ugly Swans, The Prestige
2007: The Man from Earth
Sunshine, Evangelion 1.0
2008: Wall-E
Iron Man
2009: Moon
District 9, Summer Wars
2010: Inception
2011: Source Code
X-Men First Class, Rise of the Planet of the Apes
2012: The Avengers
Travelling Salesman, Doomsday Book, Looper, John Carter
2013: Upstream Color
Her, Snowpiercer, Coherence
2014: Interstellar
Ex Machina, Dawn of the Planet of the Apes, X-Men Days of Future Past, Guardians of the Galaxy
2015: The Martian
Mad Max Fury Road, World of Tomorrow
2016: Arrival
Captain America Civil War, Rogue One
2017: Blade Runner 2049
Star Wars Last Jedi, Shape of Water, Spider-Man Homecoming, Logan
2018: Avengers Infinity War
Black Panther, Sorry to Bother You, Annihilation