Calculate the Natural Rate of Unemployment with Given Employment Data

The natural rate of unemployment can be calculated as:

'Natural rate of unemployment = (1 - percentage of employed who lose their jobs) / (1 + percentage of unemployed who find jobs)'

Substituting the given values, we get:

'Natural rate of unemployment = (1 - 0.009) / (1 + 0.21) = 0.991 / 1.21 = 0.819'

Converting this to a percentage, we get:

'Natural rate of unemployment = 0.819 * 100% = 81.9%'

Therefore, the answer is none of the options provided.