get observations

Stored time series of Union Government fiscal numbers (₹ crore / percent). series_id: one or comma-separated ids from list_series (or use search words). statistic: actuals_ytd | actuals_month | budget_estimate | revised_estimate | actuals_ytd_coppy | pct_of_estimate | pct_of_estimate_coppy | pct_change_from_previous | gdp. start/end: 'YYYY-MM' (or FY 'YYYY-YY' for estimates). fiscal_year: '2025-26