Horizontal Age Groups

import matplotlib.pyplot as plt
import numpy as np

COLORS = {'bars': '#10B981', 'median': '#1E293B', 'background': '#FFFFFF', 'text': '#1E293B', 'text_muted': '#64748B', 'grid': '#F1F5F9'}

np.random.seed(42)
ages = np.clip(np.random.gamma(7, 5, 800), 0, 90)

fig, ax = plt.subplots(figsize=(10, 6), dpi=100)
ax.set_facecolor(COLORS['background'])
fig.patch.set_facecolor(COLORS['background'])

ax.hist(ages, bins=18, color=COLORS['bars'], edgecolor='white', linewidth=0.5, alpha=0.8, orientation='horizontal')
ax.axhline(np.median(ages), color=COLORS['median'], linewidth=2, linestyle='--', label=f'Median: {np.median(ages):.0f}')

ax.spines['top'].set_visible(False)
ax.spines['right'].set_visible(False)
ax.spines['left'].set_color(COLORS['grid'])
ax.spines['bottom'].set_color(COLORS['grid'])
ax.xaxis.grid(True, color=COLORS['grid'], linewidth=1, zorder=0)
ax.set_axisbelow(True)
ax.tick_params(axis='both', colors=COLORS['text_muted'], labelsize=9, length=0, pad=8)
ax.set_xlabel('Count', fontsize=10, color=COLORS['text'], labelpad=10)
ax.set_ylabel('Age', fontsize=10, color=COLORS['text'], labelpad=10)
ax.legend(loc='upper center', bbox_to_anchor=(0.5, -0.12), frameon=False, fontsize=9, labelcolor=COLORS['text_muted'])

plt.tight_layout()
plt.show()