85
You average 6.5 CS per minute as Mid; Master players average about 7.8. Every 15 CS is roughly a kill worth of gold. Practise last-hitting under tower, shove the wave before recalling, and catch side waves between fights instead of standing in lane doing nothing.
You take part in 47% of your team's kills; Master players average 60%. After your first item, look to rotate for dragon, grubs and herald, and keep Teleport for fights rather than for farming.
You spend 11% of your games dead. Late deaths cost a minute each; when a fight is lost, back off and defend rather than adding one more death to it.
You typically come out of lane ahead of your opponent. Turn that lead into map pressure: shove, take plates, then move to help another lane while your opponent is stuck.
