| Variable | Symbol | difference | Dickey Fuller | result |
| Intercept | ||||
| Profitability | PROF | level | −5.00 | I(0) |
| Premium of life insurance | PLI | level | −3.42 | I(1) |
| First level | −4.84 | |||
| Premium of non-life insurance | PNLI | level | −1.05 | I(1) |
| First level | −7.39 | |||
| Gross Domestic Product | GDP | level | −2.16 | I(1) |
| First level | −5.31 | |||
| Inflation | INF | level | −3.03 | I(1) |