At 21 our social circle is at its largest with 100 including 13 'best' friends, 17 'close' friends and 70 acquaintances.
This number drops sharply to 68 by the time we are 29-years-old.
The decline continues to 63 at age 39, 43 at 49-years-old and plummets to around 41 when we hit 55.
Via Mail On Sunday