Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.04597 -0.02293 -0.00858  0.00639  0.35745 

Coefficients:
             Estimate Std. Error t value      Pr(>|t|)    
(Intercept)  0.045970   0.007298   6.299 0.00000000342 ***
xAmericas   -0.031837   0.012010  -2.651      0.008928 ** 
xAsia       -0.002316   0.010839  -0.214      0.831124    
xEurope     -0.037371   0.010385  -3.599      0.000439 ***
xOceania    -0.022972   0.016481  -1.394      0.165497    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04673 on 144 degrees of freedom
Multiple R-squared:  0.1164,	Adjusted R-squared:  0.09183 
F-statistic: 4.741 on 4 and 144 DF,  p-value: 0.001269