Online Appendix B, Table B.1, sets out the contributions of individual assets. Between 1990–2008, software is the largest contributor (0.16%p.a.), with organisational capital 0.15%p.a.. R&D contributes 0.05%p.a. In the late 1990s, the contribution of software (0.23%p.a.) came close to that of non-computer tangibles (0.25%p.a.), a remarkable result highlighting the importance of knowledge assets in that period.