your line attenuation of 63.5db suggests a distance of above 4.56K from the exchange, could well be more!.
On the above you could expect the following :-
Estimation of your maximum rate adaptive adsl speed
Downstream
Attenuation 63,5dB Approx Line Length 4.56 or more Kilometres from the exchange.
dslMAX 1952kbps IP Profile 1500 kbps
adsl2+ (21CN) 2016kbps IP Profile 1750 kbps
adsl2+ (LLU) 2016kbps Throughput 1784kbps
You could go
here and add your details for a more detailed idea of distance from exchange.