What speed you syncing at, and what speed profile are you on?
And do you sync using G.DMT or ADSL2+ Modulation?
According to your stats, you are about 2.3KM away from the DSLAM/IMAX
Those readings are acceptable or average, but the higher speed you sync at the more strain is placed on your line.
Here are my readings
Copper Length(km) 0.38
Upstream 1019 kbps
Downstream 10015 kbps
Attenuation Downstream(db) 4
Attenuation Upstream(db) 4
SNR Margin Downstream(db) 27.0
SNR Margin Upstream(db) 20.0
2Meg Sync and on ADSL (G.DMT)