List the sectoral weightage allocation in Nifty 50 as mentioned in the above passage. Use the format ‘Sector Name - Percentage’ in a numbered list to depict the results and also sort the result based on highest allocation percentage to the lowest.

1. financial services - 36.81% 
2. IT - 14.70%
3. oil and gas - 12.17%
4. consumer goods - 9.02% 
5. automobiles - 5.84%