Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.02712 -0.01961 -0.01288  0.01117  0.17848 

Coefficients:
             Estimate Std. Error t value             Pr(>|t|)    
(Intercept)  0.019444   0.002012   9.662 < 0.0000000000000002 ***
xNA          0.005201   0.007304   0.712              0.47668    
xnon-Annex I 0.007678   0.002612   2.940              0.00339 ** 
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03367 on 709 degrees of freedom
Multiple R-squared:  0.01205,	Adjusted R-squared:  0.009265 
F-statistic: 4.325 on 2 and 709 DF,  p-value: 0.01359