Hi Miss Anna.
Again, please do not forget to upload your figure here.
Overall, New Zealand generated larger electricity than Germany in 1980, but it ...
i suggest you to change the "generated larger electricity" because the data are not available at the figure. i'm afraid that it could be an opinion.
... to produce electricity in both New Zealand.
==> both countries
... more than a half of coal
than WHILE Germany ...
New Zealand in 2010 at 150 that six fold lower than Germany.
==> that are six fold higher than Germany.
It had the same number of petroleum source in ...same number with?
I hope it can be useful for you.
Goodluck and Keep Spirited.