Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.02919 -0.02905 -0.01510 -0.01464  0.41430 

Coefficients:
              Estimate Std. Error t value            Pr(>|t|)    
(Intercept)   0.029195   0.003608   8.092 0.00000000000000255 ***
xNA          -0.021542   0.013095  -1.645             0.10042    
xnon-Annex I -0.014094   0.004683  -3.010             0.00271 ** 
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.06037 on 709 degrees of freedom
Multiple R-squared:  0.01407,	Adjusted R-squared:  0.01129 
F-statistic: 5.059 on 2 and 709 DF,  p-value: 0.006583