Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.055863 -0.020190 -0.003872  0.014196  0.111452 

Coefficients:
              Estimate Std. Error t value         Pr(>|t|)    
(Intercept)   0.003889   0.005812   0.669            0.504    
xNA          -0.003872   0.036758  -0.105            0.916    
xnon-Annex I  0.051976   0.006772   7.675 0.00000000000218 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.0363 on 146 degrees of freedom
Multiple R-squared:  0.2921,	Adjusted R-squared:  0.2824 
F-statistic: 30.12 on 2 and 146 DF,  p-value: 0.00000000001118