Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.016100 -0.011553 -0.007631  0.002760  0.218734 

Coefficients:
              Estimate Std. Error t value      Pr(>|t|)    
(Intercept)   0.009040   0.001510   5.985 0.00000000343 ***
xNA          -0.004453   0.005482  -0.812      0.416865    
xnon-Annex I  0.007061   0.001960   3.602      0.000338 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.02527 on 709 degrees of freedom
Multiple R-squared:  0.0215,	Adjusted R-squared:  0.01874 
F-statistic: 7.788 on 2 and 709 DF,  p-value: 0.0004512