US Budgets adjusted for inflation, Data from https://www.presidency.ucsb.edu/statistics/data/federal-budget-receipts-and-outlays

budget.csv

budget.py

import pandas as pd
import cpi
import altair as alt

df = pd.read_csv('budget.csv', sep=',', index_col=False)

years = []
adjusted = []
for _, row in df.iterrows():
    years.append(row['Year'])
    try:
        a = cpi.inflate(row['Budget'], int(row['Year']))
    except cpi.errors.CPIObjectDoesNotExist:
        # No data for 2019 and later, assume:
        if row['Year'] == 2021:
            inflation = 1.04
        else:
            inflation = 1.02
        
        a = row['Budget'].item()*inflation
    adjusted.append(a)

xticks = [y for y in range(1930, 2021, 3)]

data = pd.DataFrame({'Year': years, 'Budget': adjusted})
chart = alt.Chart(data, width=800).mark_line().encode(
    x=alt.X('Year:O', axis=alt.Axis(values=xticks)),
    y=alt.Y('Budget:Q', title='Budget (Billions)')
).properties(        
    title="US Budgets Adjusted for Inflation (1930-2021)"
)
chart.save('budget.png')

Why 1.04 for 2021? Since it's the latest year, shouldn't it be just 1? Or is the CPI value from Jan. 2022 now the reference value?

My friend I don't remember anymore :) Feel free to use the script to double check!