I have the same question as Ebe

-- are you only doing the exercises you listed? Are you doing the same workout every time? Because that would explain your stall in strength gains.
Your muscles adapt to any workout, usually in 4 - 6 weeks. So you need to be constantly changing workouts in order to progress. One change you can make is the exercises you're doing. Instead of bench press for chest, do incline DB press or a pec flye, for example.
Since you've been lifting for a year, another change you could make is to focus on a specific muscle groups or groups each time you lift rather than doing a whole body workout every time. That allows you to do more and different exercises for each muscle group. It's called a 'split' and there are many different splits you can read about.
If you make some changes, I'm guessing you'll see some progress.