The answer to this question depends on the ratio os what aspect of plants and humans you are interested in. Is it the ratio of:
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The Golden Ratio is interesting due to it being in place throughout nature. The Golden Ratio is present within humans, several species of plants, and even in the shells of some species invertibrates.
Boys/Girls = approx 107/100
3 dominant to 1 recessive
Several million animals per each human. Globally, the ratio of just ants to humans is estimated to be 1.4 million to 1. Add in all the other animal species and the ratio will increase to several millions - if not more - to 1. The ratio for Germany is likely to be of the same order of magnitude since there is no reason to assume that Germany will be greatly different from elsewhere in the world.
A great many things have the golden ratio in them varying from things fabricated by humans such as architecture, the proportions of the sides of a book also fall into the golden ratio. The golden ratio also occurs naturally for example the spiral in the snail's shell falls into the golden ratio. Generally most man made things have the golden ratio in them as it has been found quite simply, to look good.