Calculation for the EU
 
now sheet 'base data'
budget 2020 - 2100: 550.00 Gt 'goal seek' is ok
country Global sheet 'goal seek'
             
input fields  
data base EEA (incl. LUC/ISA)
  EU27 weighted key global budget 2020 on EU27 budget 2020 on
 
 
emissions share 7.13% 6.5% 550 35.56
population share 5.80%
Test macro:
delete  EU data in sheet "base data"
macro:
convert links into values "base data"
macro:
find budget > 2030 target
data macro 'finding budget':
weighting population 50% Specified emissions target 2030   0% RM-2 exp RM-3 lin RM-4 quadr RM-5 rad RM-6 abs
global budget 2020 on[1] 550 Current emissions target 2030   0% -30.9% 38.3% -4.3% 10.8% -14.5%
potential NNE -1% Specified maximum global budget   Gt
    Current global budget   Gt
E_90 3.79
E_18 3.05
E_19 2.92 -4.2%
E_20 2.55 -12.7% Data from the "WP" tool: https://doi.org/10.5281/zenodo.5837866      
E_21 2.74 7.6% 1990 2010 2015 2018 2019 2020 2021 2022
E_22 2.72 -0.7% 3.79     3.05 2.92 2.55 2.74 2.72
data status EEA: Apr 24 share P 5.80%
share E 7.13%

[1]
see paper for download on the right side