Quite a lot of diversity and range here. Many people seemed to round off their experience to the nearest 5 years, hence those answers being at the top.
Either that or adoption cycles happen every 5 years. Who knows. I guess people really tend to remember the year they started using Unix.

Unix adoption by decade
Decade |
Responses |
0f Total |

1970s | 4 | 0.4% |

1980s | 29 | 2.8% |

1990s | 295 | 28.6% |

2000s | 638 | 61.9% |

2010s | 64 | 6.2% |

Years experience with Un*x OS (orderd by years)
Years (start year) |
Responses |
0f Total |

39 (since 1973) | 1 | 0.1% |

38 (since 1974) | 1 | 0.1% |

36 (since 1976) | 1 | 0.1% |

34 (since 1978) | 1 | 0.1% |

31 (since 1981) | 1 | 0.1% |

30 (since 1982) | 1 | 0.1% |

29 (since 1983) | 1 | 0.1% |

28 (since 1984) | 3 | 0.3% |

27 (since 1985) | 5 | 0.5% |

26 (since 1986) | 3 | 0.3% |

25 (since 1987) | 10 | 1.0% |

23 (since 1989) | 5 | 0.5% |

22 (since 1990) | 6 | 0.6% |

21 (since 1991) | 7 | 0.7% |

20 (since 1992) | 53 | 5.1% |

19 (since 1993) | 4 | 0.4% |

18 (since 1994) | 24 | 2.3% |

17 (since 1995) | 20 | 1.9% |

16 (since 1996) | 22 | 2.1% |

15 (since 1997) | 89 | 8.6% |

14 (since 1998) | 41 | 4.0% |

13 (since 1999) | 29 | 2.8% |

12 (since 2000) | 72 | 7.0% |

11 (since 2001) | 18 | 1.7% |

10 (since 2002) | 96 | 9.3% |

9 (since 2003) | 34 | 3.3% |

8 (since 2004) | 67 | 6.5% |

7 (since 2005) | 59 | 5.7% |

6 (since 2006) | 77 | 7.4% |

5 (since 2007) | 88 | 8.5% |

4 (since 2008) | 67 | 6.5% |

3 (since 2009) | 59 | 5.7% |

2.5 (since 2009.5) | 1 | 0.1% |

2 (since 2010) | 44 | 4.3% |

1 (since 2011) | 19 | 1.8% |

0.3 (since 2011.7) | 1 | 0.1% |

"NO ANSWER" | 4 | 0.4% |

Years experience with Un*x OS (ordered by count)
Years (start year) |
Responses |
0f Total |

10 (since 2002) | 96 | 9.3% |

15 (since 1997) | 89 | 8.6% |

12 (since 2000) | 72 | 7.0% |

20 (since 1992) | 53 | 5.1% |

14 (since 1998) | 41 | 4.0% |

13 (since 1999) | 29 | 2.8% |

18 (since 1994) | 24 | 2.3% |

16 (since 1996) | 22 | 2.1% |

17 (since 1995) | 20 | 1.9% |

11 (since 2001) | 18 | 1.7% |

25 (since 1987) | 10 | 1.0% |

5 (since 2007) | 88 | 8.5% |

6 (since 2006) | 77 | 7.4% |

21 (since 1991) | 7 | 0.7% |

8 (since 2004) | 67 | 6.5% |

4 (since 2008) | 67 | 6.5% |

22 (since 1990) | 6 | 0.6% |

7 (since 2005) | 59 | 5.7% |

3 (since 2009) | 59 | 5.7% |

27 (since 1985) | 5 | 0.5% |

23 (since 1989) | 5 | 0.5% |

2 (since 2010) | 44 | 4.3% |

19 (since 1993) | 4 | 0.4% |

9 (since 2003) | 34 | 3.3% |

28 (since 1984) | 3 | 0.3% |

26 (since 1986) | 3 | 0.3% |

1 (since 2011) | 19 | 1.8% |

39 (since 1973) | 1 | 0.1% |

38 (since 1974) | 1 | 0.1% |

36 (since 1976) | 1 | 0.1% |

34 (since 1978) | 1 | 0.1% |

31 (since 1981) | 1 | 0.1% |

30 (since 1982) | 1 | 0.1% |

29 (since 1983) | 1 | 0.1% |

2.5 (since 2009.5) | 1 | 0.1% |

0.3 (since 2011.7) | 1 | 0.1% |

"NO ANSWER" | 4 | 0.4% |