If the errors are the same in 2011, a 1-percentage-point difference would fall within the sampling error. Perceptions worsened between 1997 and 2002, in 2002, 87% of the population felt that distribution was unfair or very unfair. This is 7 percentage points more than in 1997. Perceptions improved between 2002 and 2007, when the countries recorded strong economic growth, in 2007, the percentage of the population thinking that distribution was unfair or veiy unfair was 9 percentage points lower than in 2002.