Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.048670 -0.017477 -0.005325  0.005136  0.219865 

Coefficients:
             Estimate Std. Error t value   Pr(>|t|)    
(Intercept)  0.025014   0.005078   4.926 0.00000228 ***
xAmericas    0.023661   0.008357   2.831    0.00530 ** 
xAsia       -0.007498   0.007542  -0.994    0.32185    
xEurope     -0.019673   0.007226  -2.722    0.00728 ** 
xOceania    -0.018444   0.011468  -1.608    0.10997    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03252 on 144 degrees of freedom
Multiple R-squared:  0.1706,	Adjusted R-squared:  0.1476 
F-statistic: 7.406 on 4 and 144 DF,  p-value: 0.00001878