Your Line Rate (Speed) of1920 kb/s is within the range predicted: 1.5 mb/s - 2.0 Mb/s.
In order that your Broadband runs reliably the date rate is actually restricted to a rate lower than your Line Rate. This is called an IP Profile. In the case of your Line Rate you should expect an IP Profile of 1500 Kb/s - which is what you have. In the real world there are network overheads that reduce that actual rate to slightly under the IP Profile number - which is what you have. (That is to say the Throughput number.)
The predicted Line Rate is usually a little pessimistic and so you may be able to get your actual Line Rate up a little by ensuring that your Internal Wiring is not affecting your speed. For example by ensuring that the Ring Wire is disconnected. (There are umpteen threads here on how to do that.)
For example, if you can get your Line Rate over 2016 kb/s, then your IP Profile will rise in line with it to 1750 kb/s.