Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.02321 -0.01677 -0.01282  0.00569  0.41524 

Coefficients:
              Estimate Std. Error t value            Pr(>|t|)    
(Intercept)   0.023212   0.002215  10.479 <0.0000000000000002 ***
xNA          -0.019734   0.008040  -2.455              0.0143 *  
xnon-Annex I -0.006443   0.002875  -2.241              0.0253 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03707 on 709 degrees of freedom
Multiple R-squared:  0.0127,	Adjusted R-squared:  0.009919 
F-statistic: 4.561 on 2 and 709 DF,  p-value: 0.01076