The use of BitTorrent file sharing service has dropped by 20% in the US during the last six months, according to new research.

Research by broadband measurement firm Sandvine revealed a sharp drop in the bandwidth occupied by BitTorrent traffic, some of which are linked with the illegal downloads of music and movies.

According to the report, video pushed the average monthly mobile usage in Asia-Pacific to over one GB, which accounts for 50% of heavy downstream traffic and is over two times the 443mb monthly average in North America.

However, in Europe, BitTorrent remained popular, with about 50% of all uploaded traffic still credited to the protocol.

The report also noted that Netflix (31.6%) topped the list of downstream application in North America and accompanied by YouTube (18.6%) for over half of downstream traffic on fixed networks.

In addition, P2P Filesharing currently accounts for not more than 10% of overall daily traffic in North America, which is far less compared to 31% of traffic five years ago.