Table:
cross-border exports
domestic canadian exports
domestic u.s. exports
total expenditures

canada to the united states
united states to canada
inter-provincial
intra-provincial
inter-state
intra-state
canada
united states

percent change

reduction in border costs
82.2
71.6
-52.0
-46.1
8.9
10.3
11.4
0.8

increase in border costs
-23.4
-18.1
11.3
9.8
1.1
0.7
-1.8
-0.2

Statement: an increase to mfn tariffs plus associated non-tariff barriers reduces u.s. exports to canada by 18%.
Question: how many percentage points of increase does an increase to mfn tariffs plus associated non-tariff barriers reduce u.s. exports to canada?
Answer: [18.1]