Less than 10 times for salaries. My cousin, who has a second upper from NUS, started work in 1975 as a civil servant, earning $700 per month. Today, starting pay for the same job with the same qualification will only be $3000+. That's only a five-fold increase.
Last time $700 "chai hu" can buy a terrace house in "ang Sa li" or Sembawang Hills or Yio Chu Kang..or Sembawang Rd towards the Shipyard.. but now it has come a full circle, $800 income can buy a 3 room flat in Punggol, by courtesy of $8 "cow". so good ah!