Before revision:  These clusters are consistent with the nature of the underlying economies - but also show striking divergences during economic crises. Indeed a temporally resolved analysis of the fluctuations indicates significant disruption during the crisis of 2008-09 underlining its severity .
After revision:  These clusters are consistent with the nature of the corresponding fluctuations. Approaches similar to that presented here may help in identifying invariant features obscured by the heterogeneous nature of components in other complex systems .