Comparatively and Relatively - Grammar help

Could anyone help me with these sentences please.

Comparatively

1. China's population is comparatively high than that of India.

2. China's population is comparatively higher than that of India.

3. China's population is comparatively high compared to that of India.

4. Our economy is comparatively better than that of Australia.

Relatively

5. The rainfall was relatively higher than in the previous year.

6. The rainfall was relatively high than in the previous year.

Thanks