Template:Chart of NZ vineyard area by variety over time/doc

This template uses Graph:Chart to produce a stacked line graph of New Zealand's vineyard area by grape variety over time, using data from the annual reports available from New Zealand Winegrowers, the national industry organisation. Currently, they do not publish their statistics with an open license, so we can't use Wikidata-based tab-delimited files (yet... we're working on it!)

The colour values used in the chart are from BrewerColors, using Set3.

Usage
To include this chart in an article, simply place the following where you need it:

Which should produce a nice stacked graph:

Citation
You can optionally supply a named ref tag if the article already has a citation for the New Zealand Winegrowers reports and statistics page, otherwise one will be generated with the reference name. The ref is supplied as the first parameter, for example:

The default citation will look something like this: