If I proposed my PhD this year (but have not defended) can I say that I graduated this year? I am in a PhD program, and all I need to do is defend.  There is still a little more work I need to do before this, but my degree is essentially finished. I have totally completed all other requirements (classes, qualifying exams, proposals, publications, etc).    

In my field (engineering)  it is common to immediately begin applying for jobs after the proposal.  So, after many interviews, I was offered a job.  They want me to start ASAP.  I am thinking this will push my PhD defense back 1 to 1.5 years.  

Anyways, on my resume, linkedin, etc I would rather say me PhD was 2009 - 2015 (6 years) than 2009 - 2016/2017.  (7-8 years).  Would it be acceptable to state that this year (2015) is my graduation year?  I feel I'm selling myself short is I state 2016 or 2017 as my graduation year.
No, you can't state that 2015 is your graduation year. The year you graduate has a well-defined meaning -- it's the year the university confers your degree to you. Period. Writing that 2015 is your graduation year would be the same, ethically, as writing that 2013 is your graduation year just to make your resume look more impressive.
Your resume will, correctly, indicate that you're working at the same time as completing your degree, which should be impressive enough for anyone doing bookkeeping on your dates.