Currency Converter Foreign Exchange Rates OANDA

First things first:
Dataset from kaggle
This image from Wikipedia is what I want to create
R code:

library(ggplot2) african_economicdata <- read.csv("african_crises.csv") Z_ED <- subset(african_economicdata, country == "Zimbabwe") Z_ED2001 <- subset(Z_ED, year > 2000) Z_ED2001$log10_exchange <- log10(Z_ED2001$exch_usd) ggplot(Z_ED2001, aes(Z_ED2001$year,Z_ED2001$log10_exchange)) + geom_line() +geom_point() + xlab("Year") + ylab("Exchange Rate in USD") + theme_minimal()

Here is what the result looks like
A few things are throwing me off:

This happens to be a cross section of two things i never really understood in my bachelors, forex and logarithms
From the eye test the curve looks similar to the image from wikipedia, but the y-axis values don't make much sense to me (possibly due logarithms as previously stated).
The dataset in Kaggle is light on details and I don't really know how to interpret the exchange rate values. Take 2001 for instance, does 5.510 x 10^-25 mean that 1 ZWD is equal to 5.510 x 10^-25 USD? The number is so small that it kind of melts my brain.
I'm having trouble finding information about the ZWD during this time period, the trends in the wikipedia image for OMIR and the Parallel rate seems to have much fine grain data, looking at the fluctuations between 07-08. Does that mean that the data I'm working with would be the Official data?

Free foreign exchange rates and tools including a currency conversion calculator, historical rates and graphs, and a monthly exchange rate average. Energy EXCH is for professional traders participating in the energy markets. Its mission is to connect traders to the markets and to each other. North American Edition. Dollar and yen firmness, and sterling underperformance has continued for a second day. The narrow trade-weighted USD index (DXY) lifted to a one-month peak at 93.64, extending the rebound from the 29-month low that was seen last week at 91.75. Forex Factory is where professional traders connect to the forex markets, and to each other. OANDA's currency calculator tools use OANDA Rates ™, the touchstone foreign exchange rates compiled from leading market data contributors.Our rates are trusted and used by major corporations, tax authorities, auditing firms, and individuals around the world.

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Currency Converter Foreign Exchange Rates OANDA

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