Outbound calls to US residents rose by 10.3% in 2016, the latest year for which the data is available, but this is still well below the 18.5% average increase of more than 7% for the past decade.
It also marks a sharp drop from the 7.5%-plus growth of the previous five years.
The average monthly call volume for outbound calls from US residents fell to 4.6 billion last year from 6.4 billion in 2015.
While outbound call volume has been on a rise in recent years, the data show that the percentage of outbound phone calls coming from US households continues to be lower than it was in 2015, at about 12% for those in the top 10% of income earners.
That’s down from 19% in 2015 and 20% in 2014.
The data also show that people in the bottom 10% (people making less than $25,000 per year) saw their outbound outbound volume drop to 8.1 billion in 2016 from 10.1 in 2015 — a big drop.
For the first time, the percentage who used outbound services as their primary method of contact with the outside world has dropped in the past two years.